Women's experiences of continuity of midwifery care in a randomised controlled trial in Australia

OBJECTIVE: to compare the experiences of women who received a new model of continuity of midwifery care with those who received standard hospital care during pregnancy, labour, birth and the postnatal period. DESIGN: a randomised controlled trial was conducted. One thousand and eighty-nine women were randomly allocated to either the new model of care, the St George Outreach Maternity Project (STOMP), or standard care. Women completed a postal questionnaire eight to ten weeks after the birth. PARTICIPANTS: women in the trial were of mixed obstetric risk status and more than half the sample were born in a non-English speaking country. FINDINGS: questionnaires were returned from 69% of consenting women. STOMP women were significantly more likely to have talked with their midwives and doctors about their personal preferences for childbirth and more likely to report that they knew enough about aspects of labour and birth, particularly induction of labour, pain relief and caesarean section. Almost 80% of women in the STOMP group experienced continuity of care, that is, one of their team midwives was present, during labour and birth. STOMP women reported a significantly higher 'sense of control during labour and birth'. Sixty-three per cent of STOMP women reported that they 'knew' the midwife who cared for them during labour compared with 21% of control women. In a secondary analysis, women who had a midwife during labour who they felt that they knew, had a significantly higher sense of 'control' and a more positive birth experience compared with women who reported an unknown midwife. Postnatal care elicited the greatest number of negative comments from women in both the STOMP and the control group. CONCLUSION: The reorganisation of maternity services to enable women to receive continuity of care has benefits for women. The benefits of a known labour midwife needs further research.     

Birth Outcomes for Midwifery Clients Who Begin Postdates Induction of Labour Under Midwifery Care Compared With Those Who Are Transferred to Obstetrical Care

ObjectiveThis study sought to compare clinical outcomes of midwifery clients who had postdates induction of labour with oxytocin under midwifery care with those transferred to obstetrical care.MethodsThis was a retrospective cohort study using 2006-2009 Ontario Midwifery Program data. All low-risk Ontario midwifery clients who had postdates oxytocin induction were included. Groups were established according to the planned care provider at onset of induction. The primary outcome was Cesarean section (CS). The secondary outcome was a composite of stillbirth, neonatal death, or serious morbidity. Other outcomes included assisted vaginal delivery, pharmaceutical pain relief, and use of episiotomy. We stratified by parity and used logistic regression to conduct analyses controlling for maternal age (Canadian Task Force Classification II-2).ResultsFor nulliparas, postdates induction with oxytocin under midwifery care decreased the odds of interventions including assisted vaginal delivery (OR 0.68; 95% CI 0.48–0.97), episiotomy (OR 0.49; 95% CI 0.34–0.70), and pharmaceutical pain relief (OR 0.57; 95% CI 0.36–0.90), with no difference in odds of neonatal morbidity or mortality (OR 0.71; 95% CI 0.25–2.04) when compared with induction under obstetrical care. For multiparas, the use of pharmaceutical pain relief was significantly lower in the midwifery group (OR 0.65; 95% CI 0.44–0.96).ConclusionFor low-risk midwifery clients at 41 weeks or more gestation, the odds of Caesarean section and neonatal morbidity and mortality are similar when induction of labour with oxytocin under the care of a midwife is compared with induction of labour under obstetrical care, and rates of intervention are decreased.     

Outcomes of Planned Hospital Birth Attended by Midwives Compared with Physicians in British Columbia

ABSTRACT: Background: The impact of midwifery versus physician care on perinatal outcomes in a population of women planning birth in hospital has not yet been explored. We compared maternal and newborn outcomes between women planning hospital birth attended by a midwife versus a physician in British Columbia, Canada. Methods: All women planning a hospital birth attended by a midwife during the 2‐year study period who were of sufficiently low‐risk status to meet eligibility requirements for home birth as defined by the British Columbia College of Midwives were included in the study group (n =488). The comparison group included women meeting the same eligibility requirements but planning a physician‐attended birth in hospitals where midwives also practiced (n =572). Outcomes were ascertained from the British Columbia Reproductive Care Program Perinatal Registry to which all hospitals in the province submit data. Results: Adjusted odds ratios for women planning hospital birth attended by a midwife versus a physician were significantly reduced for exposure to cesarean section (OR 0.58, 95% CI 0.39–0.86), narcotic analgesia (OR 0.26, 95% CI 0.18–0.37), electronic fetal monitoring (OR 0.22, 95% CI 0.16–0.30), amniotomy (OR 0.74, 95% CI 0.56–0.98), and episiotomy (OR 0.62, 95% CI 0.42–0.93). The odds of adverse neonatal outcomes were not different between groups, with the exception of reduced use of drugs for resuscitation at birth (OR 0.19, 95% CI 0.04–0.83) in the midwifery group. Conclusions: A shift toward greater proportions of midwife‐attended births in hospitals could result in reduced rates of obstetric interventions, with similar rates of neonatal morbidity. (BIRTH 34:2 June 2007)     

Evaluation of satisfaction with midwifery care

OBJECTIVE: to determine if there were differences in women's satisfaction with maternity care given by doctors and midwives. In addition a simple, six-question, satisfaction questionnaire was to be tested. DESIGN: a randomised controlled trial comparing two models of maternity care. SETTING: a tertiary referral centre in Alberta, Canada. PARTICIPANTS: one hundred and ninety four women with a low-risk pregnancy were randomly assigned to either the midwife care, experimental group (n = 101), or the doctor care, control group (n = 93). INTERVENTIONS: a pilot midwifery programme was introduced into a maternity services delivery system that did not have established midwifery. MEASUREMENTS: women's satisfaction was measured, at two weeks postpartum, with the Labour and Delivery Satisfaction Index (LADSI), general attitudes toward the birth experience, also at two weeks postpartum; with the Attitudes about Labour and Delivery Experience (ADLE) questionnaire. Fluctuations in satisfaction were measured with a Six Simple Questions (SSQ) questionnaire at 36 weeks gestation and 48 hours, two and six weeks postpartum. FINDINGS: women in the midwife group reported significantly greater satisfaction and a more positive attitude toward their childbirth experience than women in the doctor group (p < 0.001). The SSQ demonstrated scores similar to the LADSI. Satisfaction in both groups was lowest at 36 weeks gestation and highest immediately postpartum. KEY CONCLUSIONS: women experiencing low-risk pregnancies were more satisfied with care by midwives than with care provided by doctors. Satisfaction scores were high for both groups and may have been lower for women in the doctor group as a result of disappointment with caregiver assignment as all women had sought midwifery care. The SSQ measures similar dimensions to the LADSI but the agreement is not strong enough to recommend its use as a substitute at this time. IMPLICATIONS FOR PRACTICE: the significantly higher satisfaction of the women with the care provided by the midwives together with better clinical outcomes reported elsewhere suggest that the option of midwifery care should be accessible as an option for all women in Canada. Further research is suggested to determine the usefulness of the SSQ.     

Are there inequalities in choice of birthing position?: Sociodemographic and labour factors associated with the supine position during the second stage of labour

Objective

to establish which factors are associated with birthing positions throughout the second stage of labour and at the time of birth.

Design

retrospective cohort study.

Setting

primary care midwifery practices in the Netherlands.

Participants

665 low-risk women who received midwife-led care.

Measurements and findings

a postal questionnaire was sent to women 3–4 years after birth. The number of women who remained in the supine position throughout the second stage varied between midwifery practices, ranging from 31.3% to 95.9% (p<0.001). The majority of women pushed and gave birth in the supine position. For positions used throughout the second stage of labour, a stepwise forward logistic regression analysis was used to examine effects controlled for other factors. Women aged ?36 years and highly educated women were less likely to use the supine pushing position alone [odds ratio (OR) 0.54, 95% confidence intervals (CI) 0.31–0.94; OR 0.40, 95% CI 0.21–0.73, respectively]. Women who pushed for longer than 60 minutes and who were referred during the second stage of labour were also less likely to use the supine position alone (OR 0.32, 95% CI 0.16–0.64; OR 0.44, 95% CI 0.23–0.86, respectively). Bivariate analyses were conducted for effects on position at the time of birth. Age ?36 years, higher education and homebirth were associated with giving birth in a non-supine position.

Key conclusions

the finding that highly educated and older women were more likely to use non-supine birthing positions suggests inequalities in position choice. Although the Dutch maternity care system empowers women to choose their own place of birth, many may not be encouraged to make choices in birthing positions.

Implications for practice

education of women, midwives, obstetricians and perhaps the public in general is necessary to make alternatives to the supine position a logical option for all women. Future studies need to establish midwife, clinical and other factors that have an effect on women's choice of birthing positions, and identify strategies that empower women to make their own choices.     

Comparison of the effect of caseload midwifery program and standard midwifery-led care on primiparous birth outcomes: A retrospective cohort matching study

BackgroundThe effectiveness of continuity of care during the perinatal period is well documented, but implementing continuity of care model to practice requires evaluation.AimTo evaluate the effect of a caseload midwifery program (CMP) on birth outcomes and rates of perinatal interventions at a metropolitan tertiary hospital in Australia, compared with standard midwifery-led care (SMC).MethodsThis was a retrospective, matched-cohort study. We extracted the data of 1000 nulliparous women from records of 19,001 women who gave birth at the hospital from 2011 to 2014. We used basic statistical tests to compare baseline demographic data, and logistic regression to calculate odds ratios, to evaluate maternal and neonatal outcomes.ResultsAdjusted regression analysis for the primary outcome showed that compared with women who received SMC, women who received care through CMP had an increased rate of normal vaginal birth (69% vs. 50%, OR = 1.79, 95%, CI = 1.38–2.32). Assessment of secondary outcomes showed that the women in CMP group had decreased rates of instrumental birth (15% vs. 26%, OR = 0.48, 95% CI = 0.35–0.66), episiotomy (23% vs. 40%, OR = 0.43, 95% CI = 0.33–0.57), epidural analgesia (33% vs. 43%, OR = 0.64, 95% CI = 0.50–0.83) and amniotomy (35% vs. 50%, OR = 0.56, 95% CI = 0.43–0.72). The CMP group also had greater rates of water immersion (54% vs. 22%, OR = 4.18, 95% CI = 3.17–5.5), physiological 3rd stage (7% vs. 1%, OR = 11.71, 95% CI = 3.56–38.43) and 2nd degree tear (34% vs. 24%, OR = 1.60, 95% CI = 1.21–2.11). There were no significant differences between the two groups for rates of other secondary outcomes including Caesarean section, cervical ripening procedures, third- and fourth-degree tears, postpartum haemorrhage and neonatal outcomes.ConclusionCMP care is associated with increased rate of normal vaginal birth which supports wider implementation of the model. In addition, using routinely collected data and a cohort matching design can be an effective approach to evaluate maternal and neonatal outcomes.     

Variation in home-birth rates between midwifery practices in The Netherlands

OBJECTIVE: To examine the reasons for the variation in home-birth rates between midwifery practices. METHOD: Multi-level analysis of client and midwife associated, case-specific and structural factors in relation to 4420 planned and actual home or hospital births in 42 midwifery practices. FINDINGS: Women's choice of birth location and the occurrence of complications that lead to referral to specialist care before or during labour, were found to be the main determinants of the home-birth rate. Yet, about 64% of the variation between midwifery practices is explained by midwife and practice characteristics. Higher home-birth rates were associated with a positive attitude to home-birth, a critical attitude to hospital birth for non-medical reasons, and good co-operation between midwifery practices and hospital obstetricians. CONCLUSIONS: The proportions of planned hospital birth and of referral to specialist care are the most important predictors of the actual hospital-birth rate of women receiving midwifery care. Both can be influenced by the midwife through a positive attitude to home-birth, a critical approach to non-medical reasons for hospital birth, and good co-operation with specialist obstetricians. It is, therefore, important for midwives to be aware of the influence that their own attitudes may have on the choices their clients make about home or hospital birth.     

User charges for antenatal care and ultrasound--an unwillingness to pay.

OBJECTIVE: The aim of this study was to evaluate attitudes towards user charges in specialized antenatal care, as well as if ultrasound for dating and antenatal care provided by a midwife or family doctor had been charged. SUBJECTS AND METHODS: Participants included all women delivering and registered for antenatal care at the Ume? University Hospital from September 15th-December 20th, 1995. Questionnaires, used to measure attitudes towards specialist fees, and the influence these user charges have on the utilization of services, were mailed two weeks post partum. RESULTS: Few mothers, 4%, actually hesitated or refrained from charged care, while 19%-50% would have hesitated or refrained from care if being charged. Bad economy was the significant risk factor for unwillingness to pay for care by midwife OR 2.7 (95% CI 1.4-5.6) and family doctor OR 2.5 (95% CI 1.3-5.0), referral charged for specialist care OR 4.2 (95% CI 0.5-38) and if charged early ultrasound OR 4.6 (95% CI 2.4-9.2). When adjusted for economy neither young maternal age, father's unemployment or low birth weight were significantly associated to a unwillingness to pay. CONCLUSIONS: The attitudes expressed implied that user charges could lower attendance of pregnancy ultrasound and antenatal care. This could add a substantial negative impact on perinatal outcome to an already affected group of infants with an increased risk of a low birth weight and preterm delivery, and interfere with the benefits of early dating by ultrasound.     

Maternal body mass index, delivery route, and induction of labor in a midwifery caseload

The purpose of this study was to identify the association between prepregnancy body mass index (BMI), weight gain in pregnancy, and newborn birth weight on route of delivery and induction of labor in patients receiving nurse-midwifery care. This retrospective cohort study examined the outcomes of 1500 consecutively delivered women who were cared for by two midwifery practices and delivered between January 1, 1998, and December 31, 2000. Cesarean delivery was significantly associated with the obese BMI (P < .001), nulliparity (P < .02), and newborn birth weight (P =.006). Prenatal weight gain did not have a significant correlation with cesarean birth (P = .24). In multivariable modeling, obese BMI, high newborn birth weight, nulliparity, and induction of labor increased the risk of cesarean birth. There was also a significant association between higher BMI and risk of induction of labor (P < .001). In a secondary analysis, obese BMI was associated with increased risk of induction in cases with ruptured membranes (OR 2.2; 95% CI 1.4-3.4) and postdates pregnancy (OR 2.0; 95% CI 1.1-3.4).     

The motivation and capacity to go ‘above and beyond’: Qualitative analysis of free-text survey responses in the M@NGO randomised controlled trial of caseload midwifery

Objectiveto explore whether women allocated to caseload care characterise their midwife differently to those allocated to standard care.Designmulti-site unblinded, randomised, controlled, parallel-group trial.Settingthe study was conducted in two metropolitan teaching hospitals across two Australian cities.Populationwomen of all obstetric risk were eligible to participate. Inclusion criteria were: 18 years or older, less than 24 week’s gestation with a singleton pregnancy. Women already booked with a care provider or planning to have an elective caesarean section were excluded.Interventionsparticipants were randomised to caseload midwifery or standard care. The caseload model provided antenatal, intrapartum and postnatal care from a primary midwife or ‘back-up’ midwife; as well as consultation with obstetric or medical physicians as indicated by national guidelines. The standard model included care from a general practitioner and/or midwives and obstetric doctors.Measurements and findingsparticipants’ responses to open-ended questions were collected through a 6-week postnatal survey and analysed thematically. A total of 1748 women were randomised between December 2008 – May 2011; 871 to caseload midwifery and 877 to standard care. The response rate to the 6-week survey including free text items was 52% (n=901). Respondents from both groups characterised midwives as Informative, Competent and Kind. Participants in the caseload group perceived midwives with additional qualities conceptualised as Empowering and ‘Endorphic’. These concepts highlight some of the active ingredients that moderated or mediated the effects of the midwifery care within the M@NGO trial.Key conclusioncaseload midwifery attracts, motivates and enables midwives to go Above and Beyond such that women feel empowered, nurtured and safe during pregnancy, labour and birth.Implications for practicethe concept of an Endorphic midwife makes a useful contribution to midwifery theory as it enhances our understanding of how the complex intervention of caseload midwifery influences normal birth rates and experiences. Defining personal midwife attributes which are important for caseload models has potential implications for graduate attributes in degree programs leading to registration as a midwife and selection criteria for caseload midwife positions.     

Collaboration in maternity care: a randomised controlled trial comparing community-based continuity of care with standard hospital care

Objective To test whether a new community-based model of continuity of care provided by midwives and obstetricians improved maternal clinical outcomes, in particular a reduced caesarean section rate.
Design Randomised controlled trial.
Setting A public teaching hospital in metropolitan Sydney, Australia.
Sample 1089 women randomised to either the community-based model (   n = 550  ) or standard hospital-based care (   n = 539  ) prior to their first antenatal booking visit at an Australian metropolitan public hospital.
Main outcome measures Data were collected on onset and outcomes of labour, antenatal, intrapartum and postnatal complications, antenatal admissions to hospital and neonatal mortality and morbidity.
Results There was a significant difference in the caesarean section rate between the groups, 13.3% (73/550) in the community-based group and 17.8% in the control group (96/539). This difference was maintained after controlling for known contributing factors to caesarean section (OR=0.6, 95% CI 0.4–0.9,   P = 0.02  ). There were no other significant differences in the events during labour and birth. Eighty babies (14.5%) from the community-based group and 102 (18.9%) from the control group were admitted to the special care nursery, but this difference was not significant (OR 0.75, 95% CI 0.5-1.1,   P = 0.12  ). Eight infants died during the perinatal period (four from each group), for an overall perinatal mortality rate of 7.3 per 1000 births.
Conclusion Community-based continuity of maternity care provided by midwives and obstetricians resulted in a significantly reduced caesarean section rate. There were no other differences in clinical outcomes.     

Management of prelabour rupture of the membranes in term primigravidae: report of a randomized prospective trial.

OBJECTIVE: To compare a conservative and an active policy (immediate oxytocin infusion) of management of prelabour rupture of the membranes in term primigravidae. DESIGN: Randomized trial involving 444 women. SETTING: District maternity hospital. MAIN OUTCOME MEASURES: Caesarean section rate in each group; also the rate of forceps deliveries, spontaneous deliveries, length of labour, number of vaginal examinations, type of analgesia, pyrexia in labour or the puerperium and antibiotic use in the mother and the infant in each group. The caesarean section rate for the whole trial where the latent period was greater than 12 h was compared to that where the latent period was less than or equal to 12 h. RESULTS: There were fewer caesarean sections in the conservative group (odds ratio (OR) 0.60, 95% confidence interval (CI) 0.35 to 1.02; P = 0.06). There was a similar number of forceps deliveries (OR 0.79; 95% CI 0.52 to 1.19; P = 0.26) but more spontaneous deliveries (OR 1.57; 95% CI 1.08 to 2.29; P = 0.02) in the conservative group. More women managed conservatively required inhalational analgesia only for pain relief in labour (OR 2.88; 95% CI 1.46 to 5.68; P = 0.003), a similar number required pethidine (OR 1.29; 95% CI 0.85 to 1.94; P = 0.23), and fewer required epidural analgesia (OR 0.57; 95% CI 0.39 to 0.84; P = 0.005). The number of vaginal examinations was less in the conservative group (difference between mean 0.53; 95% CI 0.25 to 0.80; P less than 0.001). Fewer women managed conservatively experienced four or more vaginal examinations in labour (OR 0.58; 95% CI 0.39 to 0.86; P = 0.007). There were no differences in the lengths of labour, the proportions of women who developed pyrexia in labour or the puerperium or who required antibiotics or in the proportions of infants who required antibiotics. CONCLUSIONS: These results argue in favour of a conservative policy in managing primigravidae at term with prelabour rupture of the membranes.     

Outcomes of physiological and active third stage labour care amongst women in New Zealand

Background

during the third stage of labour there are two approaches for care provision – active management or physiological (expectant) care. The aim of this research was to describe, analyse and compare the midwifery care pathway and outcomes provided to a selected cohort of New Zealand women during the third stage of labour between the years 2004 and 2008. These women received continuity of care from a midwife Lead Maternity Carer and gave birth in a variety of birth settings (home, primary, secondary and tertiary maternity units).

Methods

retrospective aggregated clinical information was extracted from the New Zealand College of Midwives research database. Factors such as type of third stage labour care provided; estimated blood loss; rate of treatment (separate to prophylaxis) with a uterotonic; and placental condition were compared amongst women who had a spontaneous onset of labour and no further assistance during the labour and birth. The results were adjusted for age, ethnicity, parity, place of birth, length of labour and weight of the baby.

Findings

the rates of physiological third stage care (expectant) and active management within the cohort were similar (48.1% vs. 51.9%). Women who had active management had a higher risk of a blood loss of more than 500 mL, the risk was 2.761 when a woman was actively managed (95% CI: 2.441–3.122) when compared to physiological management. Women giving birth at home and in a primary unit were more likely to have physiological management. A longer labour and higher parity increased the odds of having active management. Manual removal of the placenta was more likely with active management (0.7% active management – 0.2% physiological p<0.0001). For women who were given a uterotonic drug as a treatment rather than prophylaxis a postpartum haemorrhage of more than 500 mL was twice as likely in the actively managed group compared to the physiological managed group (6.9% vs. 3.7%, RR 0.54, CI: 0.5, 0.6).

Conclusions

the use of physiological care during the third stage of labour should be considered and supported for women who are healthy and have had a spontaneous labour and birth regardless of birth place setting. Further research should determine whether the use of a uterotonic as a treatment in the first instance may be more effective than as a treatment following initial exposure prophylactically.     

Experiences of women who planned birth in a birth centre compared to alternative planned places of birth. Results of the Dutch Birth Centre Study

Objectiveto assess the experiences with maternity care of women who planned birth in a birth centre and to compare them to alternative planned places of birth, by using the responsiveness concept of the World Health Organization.Designthis study is a cross-sectional study using the ReproQ questionnaire filled out eight to ten weeks after birth. The primary outcome was responsiveness of birth care. Secondary outcomes included overall grades for birth care and experiences with the birth centre services. Regression analyses were performed to compare experiences among the planned places of birth. The study is part of the Dutch Birth Centre Study.Settingthe women were recruited by 82 midwifery practices in the Netherlands, within the study period 1 August 2013 and 31 December 2013.Participantsa total of 2162 women gave written consent to receive the questionnaire and 1181 (54.6%) women completed the questionnaire.Measurements and findingswomen who planned to give birth at a birth centre:(1) had similar experiences as the women who planned to give birth in a hospital receiving care of a community midwife.(2) had significantly less favourable experiences than the women who planned to give birth at home. Differences during birth were seen on the domains dignity (OR=1.58, 95% CI=1.09–2.27) and autonomy (OR=1.77, 95% CI=1.25–2.51), during the postpartum period on the domains social considerations (OR=1.54, 95% CI=1.06–2.25) and choice and continuity (OR=1.43, 95% CI=1.00–2.03).(3) had significantly better experiences than the women who planned to give birth in a hospital under supervision of an obstetrician. Differences during birth were seen on the domains dignity (OR=0.51, 95% CI=0.31–0.81), autonomy (OR=0.59, 95% CI=0.35–1.00), confidentiality (OR=0.57, 95% CI=0.36–0.92) and social considerations (OR=0.47, 95% CI=0.28–0.79). During the postpartum period differences were seen on the domains dignity (OR=0.61, 95% CI=0.38–0.98), autonomy (OR=0.52, 95% CI=0.31–0.85) and basic amenities (OR=0.52, 95% CI=0.30–0.88). More than 80% of the women who received care in a birth centre rated the facilities, the moment of arrival/departure and the continuity in the birth centre as good.Key conclusions and implications for practicein the last decades, many birth centres have been established in different countries, including the United Kingdom, Australia, Sweden and the Netherlands. For women who do not want to give birth at home a birth centre is a good choice: it leads to similar experiences as a planned hospital birth. Emphasis should be placed on ways to improve autonomy and prompt attention for women who plan to give birth in a birth centre as well as on the improvement of care in case of a referral.     

Placental weight and efficiency in relation to maternal body mass index and the risk of pregnancy complications in women delivering singleton babies

Herein we report placental weight and efficiency in relation to maternal BMI and the risk of pregnancy complications in 55,105 pregnancies. Adjusted placental weight increased with increasing BMI through underweight, normal, overweight, obese and morbidly obese categories and accordingly underweight women were more likely to experience placental growth restriction [OR 1.69 (95% CI 1.46-1.95)], while placental hypertrophy was more common in overweight, obese and morbidly obese groups [OR 1.59 (95% CI 1.50-1.69), OR 1.97 (95% CI 1.81-2.15) and OR 2.34 (95% CI 2.08-2.63), respectively]. In contrast the ratio of fetal to placental weight (a proxy for placental efficiency) was lower (P < 0.001) in overweight, obese and morbidly obese than in both normal and underweight women which were equivalent. Relative to the middle tertile reference group (mean 622 g), placental weight in the lower tertile (mean 484 g) was associated with a higher risk of pre-eclampsia, induced labour, spontaneous preterm delivery, stillbirth and low birth weight (P < 0.001). Conversely placental weight in the upper tertile (mean 788 g) was associated with a higher risk of caesarean section, post-term delivery and high birth weight (P < 0.001). With respect to assumed placental efficiency a ratio in the lower tertile was associated with an increased risk of pre-eclampsia, induced labour, caesarean section and spontaneous preterm delivery (P < 0.001) and a ratio in both the lower and higher tertiles was associated with an increased risk of low birth weight (P < 0.001). Placental efficiency was not related to the risk of stillbirth or high birth weight. No interactions between maternal BMI and placental weight tertile were detected suggesting that both abnormal BMI and placental growth are independent risk factors for a range of pregnancy complications.     

Value of a single early third trimester fetal biometry for the prediction of birth weight deviations in a low risk population

OBJECTIVE: To analyze the value of a single ultrasound biometry examination at the onset of the third trimester of pregnancy for the detection of small-for-gestational-age (SGA) and large-for-gestational-age (LGA) at birth in a low risk population. The aim of this study was to develop a simple and useful method for the detection of growth deviations during pregnancy in primary care (midwife or general practitioner) practices. SETTING: A Dutch primary care midwifery practice. STUDY DESIGN: In an earlier study, we developed parity and sex specific fetal growth charts of abdominal circumference (AC) and head circumference (HC) on the basis of ultrasound data of a low-risk midwifery population in the Netherlands. In the present study, we calculated sensitivity, specificity and predictive values at different cut-off points of AC and HC for the prediction of growth deviations at birth. Patients booked for perinatal care between 1 January 1993 and 31 December 2003 (n=3449) were used for the identification of cut-off points (derivation cohort) and those admitted between 1 January 2004 and 31 December 2005 (n=725) were used to evaluate the performance of these cut-offs in an independent population (validation cohort). For the determination of SGA and macrosomia at birth, we used the recently published Dutch birth weight percentiles. RESULTS: Most promising cut-offs were AC or=75(th) percentile for the prediction of macrosomia (birth weight >or=90(th) percentile). Within the validation cohort these cut-offs performed slightly better than in the derivation cohort. For the prediction of SGA, sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were 53% (95% CI 49-58%), 81% (95% CI 80-83%), 26% (95% CI 23-29%), and 93% (95% CI 93-94%), respectively. The false positive rate was 74%. For the prediction of macrosomia, the values of these parameters were 64% (95% CI 59-69%), 80% (95% CI 78-81%), 23% (95% CI 20-26%), and 96% (95% CI 95-97%), respectively. Here, false positive rate was 77%. No cut-offs were found that predicted extreme birth weight deviations (or=97.7 percentile) sufficiently well. CONCLUSIONS: In a low risk population, we could predict future growth deviations with a higher sensitivity and in a significant earlier stage (at the onset of the third trimester of pregnancy) than with the use of conventional screening methods (i.e., palpation of the uterus only and fundus-symphysis measurement). Sonographic measurement of fetal abdominal circumference enables to detect more than half of cases of SGA at birth and more than two-thirds of cases of macrosomia with acceptable false-positive rates. We suggest that fetuses with biometry results below the 25(th) percentile or above the 75(th) percentile at the onset of the third trimester of pregnancy should be more intensively investigated in order to distinguish between pathology (e.g., IUGR or macrosomia) and physiology and to decide about the appropriate level of further perinatal care.     

Are all skilled birth attendants created equal? A cluster randomised controlled study of non-physician based obstetric care in primary health care clinics in Mexico

Background

the great majority of births in Mexico are attended by physicians. Non-physician health professionals have never been evaluated or compared to the medical model of obstetric care. This study evaluates the relative strengths of adding an obstetric nurse or professional midwife to the physician based team in rural clinics.

Methods

we undertook a cluster-randomised trial in 27 clinics in 2 states with high maternal mortality. Twelve non-physician providers (obstetric nurses (4) and professional midwives (8)) were randomly assigned to clinics; 15 clinics served as control sites. Over an 18-month period in 2009–2010, we evaluated quality of care through chart review and monthly interviews with providers about last three deliveries performed. We analysed practices by creating indices using WHO care guidelines for normal labour and childbirth. Volume of care was assessed using administrative reporting forms.

Findings

two thousand two hundred fifty-four pregnancies were followed, and a total of 461 deliveries occurred in study sites. Intervention clinics were more likely to score highly on the index for favourable practices on admission (OR=3.6, 95% CI 2.3–5.8), and during labour, childbirth, and immediately post partum (OR=8.6, 95% CI 2.9–25.6) and less likely to use excessively used or harmful practices during labour, childbirth and immediately post partum (OR=0.2, 95% CI 0.1–0.4). There was a significant increase in volume of care in intervention clinics for antenatal visits (incidence rate ratio (IRR) 1.3, 95% CI 1.2–1.4), deliveries (IRR=2.5, 95% CI 1.7–3.7) and for postpartum visits (IRR=1.4, 95% CI 1.1–1.7).

Interpretation

the addition of non-physician skilled birth attendants to rural clinics in Mexico where they independently provided basic obstetric services led to improved care and higher coverage than clinics without. The potential value of including a professional midwife or obstetric nurse in all rural clinics providing obstetric care should be considered.

Funding

Mexican National Institute for Women, Mexican National Center for Gender Equity and Reproductive Health, MacArthur Foundation, Bill and Melinda Gates Foundation.     

An exploratory metasynthesis of midwifery practice in the United States

OBJECTIVES: To conduct a metasynthesis of six qualitative studies of midwifery care and process; identify common themes and metaphors among the six studies for further exploration and theory development; and create a framework for further metasynthesis of qualitative studies of midwifery practice in the USA. DESIGN: A qualitative metasynthesis to analyse, synthesise, and interpret six qualitative studies on the process and practice of midwifery care. SAMPLE AND SETTING: Hospital, birth centre, and home birth settings were represented across all of the studies. Participants included nurse- and direct-entry midwives who provided both childbearing and gynaecological care. Recipients of midwifery care also received both childbearing and gynaecological care. FINDINGS: Four overarching themes were identified: the midwife as an 'instrument' of care; the woman as a 'partner' in care; an 'alliance' between the woman and midwife; and the 'environment' of care. These were interpretively and conceptually arrayed into a helix model of midwifery care. KEY CONCLUSIONS: The findings from this exploratory metasynthesis clearly indicate that the practice of midwifery is a dynamic partnership between the midwife and the woman, and reflects an environmental perspective. In a country that has a standard of highly technical childbirth care, perhaps the most outstanding concept of this model is that of the midwife as an 'instrument' of care. The significance of the findings will be determined by their ability to guide further research efforts to support a standard of midwifery care for all women in the USA. IMPLICATIONS FOR PRACTICE: This model offers a benchmark and a structure for considering the dynamic elements of midwifery practice and key roles that the midwife plays in the health care of women and babies.     

Determining factors associated with shoulder dystocia: a population-based study

OBJECTIVE: The study was aimed to define obstetric factors associated with shoulder dystocia. METHODS: A population-based study comparing all singleton, vertex, term deliveries with shoulder dystocia with deliveries without shoulder dystocia was performed. Statistical analysis was done using multiple logistic regression analysis. RESULTS: Shoulder dystocia complicated 0.2% (n = 245) of all deliveries included in the study (n = 107965). Independent risk factors for shoulder dystocia in a multivariable analysis were birth-weight > or =4000 g (OR = 24.3; 95% CI 18.5-31.8), vacuum delivery (OR = 5.7, 95% CI 3.4-9.5), diabetes mellitus (OR = 1.7, 95% CI 1.2-2.5) and lack of prenatal care (OR = 1.5, 95% CI 1.1-2.3). A significant linear association was found between birth-weight and shoulder dystocia, using the Mantel-Haenszel procedure. Pregnancies complicated with shoulder dystocia had higher rates of third-degree perineal tears as compared to the comparison group (0.8% versus 0.1%; P < 0.001). Similarly, perinatal mortality was higher among newborns delivered after shoulder dystocia as compared to the comparison group (3.7% versus 0.5%; OR = 7.4, 95% CI 3.5-14.9, P < 0.001). In addition, these newborns had higher rates of Apgar scores lower than 7 at 1 and 5 min as compared to newborns delivered without shoulder dystocia (29.7% versus 3.0%; OR = 13.8, 95% CI 10.3-18.4, P < 0.001 and 2.1% versus 0.3%; OR = 7.2, 95% CI 2.8-18.1, P < 0.001, respectively). Combining risk factors such as large for gestational age, diabetes mellitus and vacuum delivery increased the risk for shoulder dystocia to 6.8% (OR = 32.6, 95% CI 10.1-105.8, P < 0.001). Conclusions: Independent factors associated with shoulder dystocia were birth-weight > or =4000 g, vacuum delivery, diabetes mellitus and lack of prenatal care.