孕妇产后1年内体力活动对体重滞留影响的研究

目的了解孕妇产后体重滞留情况，探索其影响因素。方法以合肥市某妇幼保健院作为研究现场，2011年9月对608名产后42 d的产妇建立基线，从合肥市孕产妇信息管理系统获取孕前体重、分娩信息。分别于产后3、6、9、12个月进行随访。观察体力活动等指标，采用重复测量资料的方差分析和混合效应模型分析产后体力活动与体重滞留的关系。结果随访608名产妇，产后3、6、9、12个月获得有效数据为502、476、469、434份。研究对象孕前体重为(54.26±8.11)kg，产后42 d和3、6、9、12个月的体重滞留分别为(7.83±5.12)、(6.58±5.21)、(5.10±5.19)、(4.07±4.96)、(3.43±4.98)kg。重复测量资料方差分析结果显示，不同时间的体重滞留差异有统计学意义(P<0.001)，不同时间的体力活动差异有统计学意义(P<0.001)。混合效应模型显示调整孕前BMI、哺乳方式、分娩方式等混杂因素后，产后体力活动与产后体重滞留有统计学关联(P<0.001)，分步调整混杂因素显示混合效应模型结果稳定。结论体力活动水平是影响产后体重滞留重要因素。     

丹阳市妇女产后体重滞留情况及影响因素

目的了解丹阳市妇女产后体重滞留情况,探索其影响因素。方法采用队列研究方法,选取2016-2017年在丹阳市人民医院进行产前检查和生产的467名孕产妇,分别对其孕16周、26周,产前、产后42天、6月和12月的情况进行随访,采用描述流行病学方法对产后体重滞留情况及影响因素进行分析。结果 467名孕妇孕前平均体重为(51.92±7.57)kg,孕期增重(16.09±4.60)kg,产后42天、6个月、12个月的体重分别为(62.29±9.21)kg、(58.67±8.97)kg、(55.44±9.01)kg,体重滞留量分别为(10.38±4.40)kg、(6.76±3.92)kg、(3.52±3.97)kg。方差分析显示,产后不同时间体重滞留量差异有统计学意义(F=147.08,P0.001);不同的孕前BMI分组之间和孕期增重分组之间体重滞留量差异均具有统计学意义(P值均0.05),且两个分组都和产后时间之间存在交互作用(P值均0.05)。孕前BMI(OR=1.075,95%CI:1.008～1.147)和月收入(OR=1.232,95%CI:1.029～1.475)是产后体重滞留的危险因素,户外活动时间是产后体重滞留的保护因素(OR=0.729,95%CI:0.574～0.926)。结论孕前BMI、月收入、户外活动时长和孕期体重增加是产后体重滞留的重要因素,建议科学指导孕产妇合理膳食、适量运动,保持体重合理增长,避免孕期增重过多,以降低不良妊娠结局及产后肥胖的发生。     

产妇久坐行为对产后一年体重滞留影响的研究

目的 分析孕妇产后久坐行为对产后体重滞留的情况及其影响因素。方法 2012年5月至2013年8月在合肥市妇幼保健所收集1 220名产后42 d产妇建立基线资料,从该市孕产妇信息管理系统获取孕前体重及分娩信息,分别于产后3、6、9、12个月随访,观察产妇久坐时间等指标,采用重复测量资料的方差分析和混合效应模型分析产妇久坐与体重滞留的关系。结果1 220名产妇最终追踪到有效数据者1 141名。该研究人群孕前体重为(53.22±6.88)kg,产后42 d和3、6、9、12个月的体重(kg)滞留分别为7.85±5.11、7.51±5.40、5.79±5.18、4.42±4.91、3.26±4.65。重复测量资料方差分析结果显示,孕妇产后不同时间段体重滞留的差异有统计学意义(P<0.001);混合效应模型显示,分步调整孕前BMI、哺乳方式、分娩方式等混杂因素后,产妇久坐行为与产后体重滞留间的差异有统计学意义(P<0.001),逐步调整混杂因素后显示混合效应模型结果稳定。结论 产妇久坐是影响产后体重滞留重要因素之一。     

北京市妇女产后体重滞留的影响因素调查

目的探讨北京妇女产后体重滞留的影响因素。方法采用前瞻性队列研究方法,在北京市某妇幼保健院纳入待分娩孕妇420名,并于产后6、12和18个月进行追踪调查,观察指标包括一般情况、孕前体重、孕期增重和产后各调查时间点的体重。结果产后6、12和18个月的调查人数分别为113、152和107人。调查对象孕期增重平均为(16.6±4.8)kg,孕期增重不足、适量和过多的比例分别为9.5%、40.2%和50.3%。产后6、12和18个月体重滞留量分别为4 kg、4 kg和2.9 kg。孕前BMI和孕期增重与妇女产后体重滞留密切相关,孕前BMI越低,孕期增重越多,产后体重滞留越多。结论孕期增重过多是造成妇女产后体重滞留最重要的原因。     

孕期增重与产后1年内体重滞留的关系分析

目的探讨孕期增重对妇女产后1年内体重滞留的影响。方法采用前瞻性队列研究的方法选取在某妇幼保健机构参加体检的产妇作为观察对象,采用四分位数法对孕期增重进行分组,在产后3个月体检时发放问卷调查,调查表为自制问卷,建立观察队列。通过查找孕期保健手册和问卷调查获取基线资料和孕前体重。产后第3个月、第6个月、第9个月、第12个月通过体重秤测量获取产后体重。主要观察指标包括孕前体重、孕期增重和产后体重滞留。结果孕妇产后第3、6、9、12个月平均体重滞留值为(8.06±5.6)kg、(6.42±5.2)kg、(4.69±5.9)kg、(3.35±4.5)kg。孕期增重过多组产后3、6、9、12个月的体重滞留值均高于其他两组,差异有统计学意义。调整孕前BMI、身高、年龄因素后,多因素Logistic回归分析显示,孕期增重过多组产后第12个月体重滞留过多的危险性增加(OR=3.08,95%CI:1.78～5.33)。结论孕期增重与产后1年内的体重滞留有正相关性,孕妇应合理摄入营养,防止孕期增重过多,减少产后体重滞留,促进身心健康发展。     

健康教育干预对妇女产后体重滞留的影响

目的:探索健康教育干预对妇女产后体重滞留的影响.方法:采取前瞻性队列研究设计方法,选择合肥市某妇幼保健站进行体检的妇女作为观察对象,并将入选对象随机分配到干预组和对照组,干预组施加3个阶段的健康教育.基线于妇女产后42天时建立,以自编式调查问卷的方式获得基线信息,随后对观察对象随访1年.产后体重恢复情况分别于42天、3个月、6个月、9个月和1年测量5次,计算各时点体重与孕前、基线体重的差值.随访期间填写知信行调查问卷,对干预效果进行评价.结果:干预组在每个随访时点上的体重减少值大于对照组,与基线比各时点体重减少值两组间差异有统计学意义(P＜0.05).随访各阶段干预组体重滞留值均小于对照组,但两组间无统计学差异.干预组在产后1年体重滞留为(2.68±4.30)kg,肥胖率是18.7％;对照组体重滞留是(3.17±4.19) kg,肥胖率为25.4％.干预有助于提高产妇健康知识水平.结论:本研究发现干预在减少产后妇女体重滞留具有一定的积极作用.建议制定更加全面的个性化健康教育方案,提高干预效应.     

城乡产后妇女体重滞留及影响因素分析

目的探讨城乡产后妇女体重滞留情况及影响因素。方法采用横断面调查方法,以石家庄、成都和齐齐哈尔市区和农村0～36月龄2791名儿童的母亲为研究对象,通过问卷调查和体格测量获得儿童母亲的人口经济学特征、儿童喂养情况以及母亲身高与孕前、分娩时和产后的体重。结果城市孕妇孕期平均体重增加(17.8kg)显著高于农村(14.0kg)(P<0.01),产后平均滞留体重(3.2kg)显著高于农村(2.3kg)(P<0.01);随着产后时间的增加调查妇女体重恢复率呈现增加趋势(P<0.01),产后9个月时体重恢复率达到三分之一;城市和农村妇女产后超重和肥胖率分别是孕前的2.3和1.92倍;影响产后妇女体重滞留因素主要有母亲孕期、生产胎次、产后月龄、孕前体重、分娩体重以及母亲是否为监护人(P<0.05)。结论科学指导孕期妇女的合理膳食、适宜的身体活动,获得合理的体重增加,可以预防产后体重滞留和肥胖的发生。     

不同喂养婴儿方式对产妇产后体重变化的影响

目的 了解妇女生育后喂养方式对体重变化的影响.方法 对孕期和产后4～6个月的孕产妇进行纵向追踪调查,记录体重变化情况.根据产妇在4个月内喂养婴儿的方式分为基本纯母乳喂养组、混合喂养组和人工喂养组,比较各组体重变化情况.结果 产后4个月内基本纯母乳喂养率为63.8％.人工喂养组孕期增重和产后42d、产后4～6个月时体重减少值均显著高于基本纯母乳喂养组(P均＜0.01);产后4～6个月时,基本纯母乳喂养组妇女的体重和体重滞留量均显著低于人工喂养组(P均＜0.05).结论 妇女产后体重滞留与采用不同的喂养婴儿方式有关,进行母乳喂养婴儿的产妇产后体重恢复较慢,但是其孕期增重、产后体重和体重滞留量都较人工喂养者轻.因此,在加强产后纯母乳喂养宣传的同时,也要加强孕前保健知识的宣传.     

婴儿早期不同喂养方式对体格生长的影响

目的：探讨不同喂养方式对婴儿体格生长的影响。方法选择出生、42 d、9个月时有完整的体重、身长数据,且生后～9个月喂养方式单一的婴儿304例,随访到18个月时有243例婴儿。按喂养方式分为母乳喂养、混合喂养和配方奶喂养组。计算18个月婴儿BMI对年龄Z评分（BAZ）并绘图。对不同喂养组的身长、体重及其增长量,BAZ分布进行比较。结果3组出生时体重、身长差异无统计学意义。42 d 时母乳喂养组体重[（5.0±0.5）kg]高于配方奶喂养组[（4.9±0.6）kg];出生～42 d母乳喂养组体重增长量[（1.7±0.4）kg]高于混合喂养组[（1.5±0.4）kg]和配方奶喂养组[（1.4±0.4）kg];42 d～9个月母乳喂养组体重增长量[（4.5±1.0）kg]低于混合喂养组[（4.8±0.8）kg]和配方奶喂养组[（5.1±1.1）kg];18个月时配方奶喂养组体重[（12.1±1.5）kg]高于母乳喂养组[（11.2±1.4）kg];9～18个月配方奶喂养组体重增长量[（2.3±0.8）kg]高于母乳喂养组[（1.8±0.7）kg]和混合喂养组[（1.9±0.5）kg];42 d～9个月配方奶喂养组身长增长量[（17.1±2.0）cm]高于母乳喂养组[（16.1±1.9）cm];18个月时配方奶喂养组身长[（83.1±3.7）cm]大于母乳喂养组[（81.5±2.9）cm];差异均有统计学意义。18月时配方奶喂养婴儿中超重（即Z评分大于2）的比例最高,为11.11％。结论3种喂养方式婴儿体重增长模式不同。早期母乳喂养的婴儿体重增长较快,配方奶喂养后期体重增长较快。不同喂养方式对婴儿早期的身长增长无影响,配方奶喂养的婴儿后期身长增长较快。配方奶喂养的婴儿18个月超重的比例最高。     

农村妇女产后采用不同喂养婴儿方式对其体重变化的影响

目的 了解农村妇女生育后喂养方式与体重滞留的关系.方法 采用整群抽样的方法 ,调查天津市津南区409名农村产妇的孕产期情况,测量了孕前、产前及产后的体蕈和身高.产妇体重滞留值为调查时测量体重与孕前体重的差值.统计学方法 采用方差分析等.结果 (1)产后4个月内基本纯母乳喂养率为70.9%(290/409).(2)在产后4～6个月时基本纯母乳喂养组妇女的体重滞留平均为5.8 kg,比人工喂养组(平均7.0 kg)少,但差异没有统计学意义(F=1.45,P=0.236);而到产后7～9个月时基本纯母乳喂养组妇女的体重滞留平均为4.9 kg,显著高于人工喂养组的2.9 kg(F=3.17,P=0.043).(3)基本纯母乳喂养组产妇食物摄入量最多(901 g),其次是混合喂养组(877 g),人工喂养组最少(750 g).结论 妇女产后体重滞留与采用不同的喂养婴儿方式有关,进行母乳喂养婴儿的产妇因为需要摄取较多能量,产后体重恢复较慢,但是其孕期增重和产后体重都较人工喂养者轻.因此,在加强产后纯母乳喂养宣传的同时,也要加强孕前保健知识的宣传.     

Association of fewer hours of sleep at 6 months postpartum with substantial weight retention at 1 year postpartum

Shorter sleep duration is linked to obesity, coronary artery disease, and diabetes. Whether sleep deprivation during the postpartum period affects maternal postpartum weight retention remains unknown. This study examined the association of sleep at 6 months postpartum with substantial postpartum weight retention (SPPWR), defined as 5 kg or more above pregravid weight at 1 year postpartum. The authors selected 940 participants in Project Viva who enrolled during early pregnancy from 1999 to 2002. Logistic regression models estimated odds ratios of SPPWR for sleep categories, controlling for sociodemographic, prenatal, and behavioral attributes. Of the 940 women, 124 (13%) developed SPPWR. Sleep distributions were as follows: 114 (12%) women slept < or =5 hours/day, 280 (30%) slept 6 hours/day, 321 (34%) slept 7 hours/day, and 225 (24%) slept > or =8 hours/day. Adjusted odds ratios of SPPWR were 3.13 (95% confidence interval (CI): 1.42, 6.94) for < or =5 hours/day, 0.99 (95% CI: 0.50, 1.97) for 6 hours/day, and 0.94 (95% CI: 0.50, 1.78) for > or =8 hours/day versus 7 hours/day (p = 0.012). The adjusted odds ratio for SPPWR of 2.05 (95% CI: 1.11, 3.78) was twofold greater (p = 0.02) for a decrease in versus no change in sleep at 1 year postpartum. Sleeping < or =5 hours/day at 6 months postpartum was strongly associated with retaining > or =5 kg at 1 year postpartum. Interventions to prevent postpartum obesity should consider strategies to attain optimal maternal sleep duration.     

Postpartum weight retention in relation to gestational weight gain and pre-pregnancy body mass index: A prospective cohort study in Vietnam

BackgroundThe prevalence of maternal overweight and obesity is increasing in Asia. This study prospectively investigated the association between pre-pregnancy body mass index (BMI), gestational weight gain (GWG) and 12-month postpartum weight retention (PPWR) in a large cohort of Vietnamese mothers.MethodsOf the 2030 pregnant women recruited from three cities in Vietnam at 24–28 weeks of gestation, a total of 1666 mothers were followed up for 12 months after delivery and available for analysis. The outcome variable PPWR was determined by subtracting the pre-pregnancy weight from the 12-month postpartum measured weight, while GWG and pre-pregnancy BMI were classified according to the Institute of Medicine and WHO criteria for adults, respectively. Linear regression models were used to ascertain the association between pre-pregnancy BMI, GWG and PPWR accounting for the effects of plausible confounding factors.ResultsBoth pre-pregnancy BMI and GWG were significantly associated with PPWR (P < 0.001). The adjusted mean weight retention in underweight women before pregnancy (3.71 kg, 95% confidence interval (CI) 3.37–4.05) was significantly higher than that in those with normal pre-pregnancy weight (2.34 kg, 95% CI 2.13–2.54). Women with excessive GWG retained significantly more weight (5.07 kg, 95% CI 4.63–5.50) on average at 12 months, when compared to mothers with adequate GWG (2.92 kg, 95% CI 2.67–3.17).ConclusionsBeing underweight before pregnancy and excessive GWG contribute to greater weight retention twelve months after giving birth. Interventions to prevent postpartum maternal obesity should target at risk women at the first antenatal visit and control their weight gain during the course of pregnancy.     

我国北方地区单胎足月初产妇孕期体重增长适宜范围

目的:探讨我国北方地区足月妊娠妇女孕期体重增长的适宜范围。方法:收集我国北方地区5 072例单胎足月初产妇孕前、孕期及产后42天资料,按照中国成人体重指数(BM I)分类要求将5 072例孕妇分组,了解各组的孕期体重增长情况,分析各组不同孕期体重增长对母儿不良妊娠结局发生率的影响,从而为各组推荐孕期体重增长的适宜范围。结果:5 072例孕妇中,孕前BM I<18.5 kg/m2,18.5～23.9 kg/m2及≥24 kg/m2的孕妇分别占16.8%,66.8%及16.4%,不良妊娠结局发生率最低的孕期体重增长范围分别为12～18 kg,10.0～16.0 kg及8.0～14.0 kg,(P<0.05),推荐的孕期体重增长范围分别为12～18 kg,10.0～16.0 kg及8.0～14.0 kg。结论:我国北方地区孕前低、正常、超重及肥胖组孕妇的平均孕期体重增长均较高,建议其孕期体重增长范围分别控制在12～18 kg,10.0～16.0 kg及8.0～14.0 kg。     

Postpartum Weight Change in Relation to Pre-Pregnancy Weight and Gestational Weight Gain in Women in Low-Income Setting: Data from the KITE Cohort in the Northern Part of Ethiopia

(1) Background: Postpartum weight may increase compared to pre-pregnancy due to weight retention or decrease due to weight loss. Both changes could pose deleterious effects on maternal health and subsequent pregnancy outcomes. Therefore, this study aimed to assess postpartum weight change and its associated factors. (2) Methods: A total of 585 women from the KIlte-Awlaelo Tigray Ethiopia (KITE) cohort were included in the analysis. (3) Results: The mean pre-pregnancy body mass index and weight gain during pregnancy were 19.7 kg/m² and 10.8 kg, respectively. At 18 to 24 months postpartum, the weight change ranged from −3.2 to 5.5 kg (mean = 0.42 kg [SD = 1.5]). In addition, 17.8% of women shifted to normal weight and 5.1% to underweight compared to the pre-pregnancy period. A unit increase in weight during pregnancy was associated with higher weight change (β = 0.56 kg, 95% CI [0.52, 0.60]) and increased probability to achieve normal weight (AOR = 1.65, 95% CI [1.37, 2.00]). Food insecurity (AOR = 5.26, 95% CI [1.68, 16.50]), however, was associated with a shift to underweight postpartum. Interestingly, high symptoms of distress (AOR = 0.13, 95% CI [0.03, 0.48]) also negatively impacted a change in weight category. (4) Conclusions: In low-income settings such as northern Ethiopia, higher weight gain and better mental health during pregnancy may help women achieve a better nutritional status after pregnancy and before a possible subsequent pregnancy.     

Postpartum weight retention among women in Rio de Janeiro: a follow-up study

This study presents follow-up results on trends in postpartum weight retention among women in the city of Rio de Janeiro, Brazil, at 0.5, 2, 6, and 9 months postpartum. The outcome variable, weight retention, was calculated by subtracting the reported pre-pregnancy weight from the observed weight at each interview. Statistical analyses used means and a 95% confidence interval for weight retention. Mean weight retention was 4.7, 4.1, 3.4, and 3.1kg at 0.5, 2, 6 and 9 months postpartum, respectively. At completion of the study, the largest weight retention was observed in women over 30 years of age (4.2kg) and with 30% or more of body fat (5.9kg). The rate of reduction in weight retention was 0.4kg/month, 0.2kg/month, and 0.1kg/ month for the periods 0.5-2, 2-6, and 6-9 months, respectively. The largest reductions were observed among young, single women and those with < 30% of body fat at baseline. The results suggest that variables such as age, parity, schooling, and body fat may be important predictors of postpartum weight retention.     

Breastfeeding and postpartum weight retention in a cohort of Brazilian women

BACKGROUND: The relation between postpartum weight retention and breastfeeding practices is controversial. OBJECTIVE: Defining breastfeeding as the period when a child is exclusively or predominantly breastfed, we studied the association between breastfeeding duration and postpartum weight retention. DESIGN: We followed 405 women aged 18-45 y who were assessed at 0.5, 2, 6, and 9 mo postpartum. The outcome variable, postpartum weight retention, was expressed as the difference between the observed weight at each follow-up and the reported prepregnancy weight. The main statistical procedure used was the longitudinal mixed-effects model. RESULTS: Mean postpartum weight retention at the end of the study was 3.1 kg. Single women aged > or = 30 y retained more weight than did younger single women or married women. The combined effect of breastfeeding duration and percentage of body fat at baseline was significant only for women with < 30% body fat. According to the model's prediction, when women who had 22% body fat and breastfed for 180 d were compared with those who had 22% body fat and breastfed for only 30 d, each month of breastfeeding contributed -0.44 kg to postpartum weight retention. When only the percentage of body fat was varied, the total effect was 3.0, 1.7, 1.2, and 0.04 kg in women with 18%, 25%, 28%, and 35% body fat, respectively. CONCLUSIONS: These results support the hypothesis of an association between breastfeeding and postpartum weight retention and suggest that encouraging prolonged breastfeeding might contribute to decreases in postpartum weight retention.     

Weight During the Postpartum Period: What Can Health Care Workers Do?

To describe the gestational month-to-month weight change, obstetric and lifestyle factors influencing postpartum weight retention (PPWR) and to suggest possible interventions to prevent PPWR. This study was part of a larger research project concerning maternal weight change after childbirth. 343 women were recruited on five maternity wards in the Antwerp region, Belgium. Weight and height were assessed by the researchers during two home visits at 3 and 14 months postpartum and participants completed a questionnaire investigating obstetric and lifestyle factors during the first home visit. The monthly weights in between the home visits were self-reported by the participants. Full data were available for 75 women. One year after childbirth 52.0 % of the women faced postpartum weight retention. The different monthly weight points within the changes differed significantly from each other up to sixth months postpartum. Prepregnancy weight, exceeding the recommendations from the Institute of Medicine (IOM) concerning weight gain during pregnancy, smoking behaviour and exercising during pregnancy significantly influenced the postpartum weight change. The amount of weight gained during pregnancy, breastfeeding, possible postpartum depression and experiencing a shortage of information concerning the weight change after childbirth significantly influenced postpartum weight retention. Weight gain during pregnancy, exceeding IOM-criteria, breastfeeding, depression and lack of information determine PPWR and can be modulated by interventions such as routine weighing or screening of pregnant women. Several of these influencing factors can be preventively influenced by health care workers. Overall, we believe women could benefit from more guidance before, during and after pregnancy. Moreover, we recommend to reintroduce routine weighing of pregnant women as weight gain during pregnancy seems one of the most important factors involved in PPWR.     

Maternal stress, physical activity, and body mass index during new mothers' first year postpartum

We evaluated associations of parenting stress, including depressive symptoms, with 51 first-time mothers' light and moderate physical activity and body mass index during the first year postpartum. The Parenting Stress Index and 24-hour physical activity recalls were completed during the first year postpartum (mean time elapsed since birth: 6 months). Direct relationships between identified variables were tested, and then hierarchical linear regression was used to assess hypothesized relationships among body mass index, physical activity, and parenting stress. Effects of parenting stress on the relationships between postpartum body mass index, light physical activity, and moderate physical activity were evaluated after controlling for factors known to be associated with overweight and low levels of physical activity in women. Mean postpartum body mass index = 27.4 kg/m2 ± 7.7, range = 18-50 kg/m2. Mean reported hours of light physical activity = 11.2 ± 3.0, and moderate physical activity = 4.5 ± 3.0 per day. Postpartum body mass index was not associated with parenting stress, but was positively related to higher pre-pregnancy body mass index (r = .89, p < .01) and light physical activity (r = .32, p < .05), and was negatively related to moderate physical activity (r = -25, p < .08). Higher postpartum body mass index (β = .27, p < .05), less concern regarding parenting competence (β = -.95, p < .001), and more depressive symptoms (β = .66, p < .01) were associated with more light physical activity (R2 = .48, p < .001). More moderate physical activity (R2 = .45, p < .001) was associated with lower postpartum body mass index (β = -.27, p < .05), more concern about parenting competence (β = 1.0, p < .001), and less depressive symptoms (β = -.68, p < .01). Higher postpartum body mass index (R2 = .89, p < .001) was associated with higher pre-pregnancy body mass index (β = .99, p < .001), more pregnancy weight gain (β = .22, p < .001), less attachment (β = -.68, p < .01), and less social isolation (β = -.13, p < .02). These data suggest that interventions that target parenting stress and depressive symptoms in addition to physical activity are needed to prevent development of overweight in new mothers.     

Modifiable Determinants of Postpartum Weight Loss in Women with Obesity: A Secondary Analysis of the UPBEAT Trial

Pregnancy can alter a woman’s weight gain trajectory across the life course and contribute to the development of obesity through retention of weight gained during pregnancy. This study aimed to identify modifiable determinants associated with postpartum weight retention (PPWR; calculated by the difference in pre-pregnancy and 6 month postpartum weight) in 667 women with obesity from the UPBEAT study. We examined the relationship between PPWR and reported glycaemic load, energy intake, and smoking status in pregnancy, excessive gestational weight gain (GWG), mode of delivery, self-reported postpartum physical activity (low, moderate, and high), and mode of infant feeding (breast, formula, and mixed). At the 6 month visit, 48% (n = 320) of women were at or above pre-pregnancy weight. Overall, PPWR was negative (−0.06 kg (−42.0, 40.4)). Breastfeeding for ≥4 months, moderate or high levels of physical activity, and GWG ≤9 kg were associated with negative PPWR. These three determinants were combined to provide a modifiable factor score (range 0–3); for each added variable, a further reduction in PPWR of 3.0 kg (95% confidence interval 3.76, 2.25) occurred compared to women with no modifiable factors. This study identified three additive determinants of PPWR loss. These provide modifiable targets during pregnancy and the postnatal period to enable women with obesity to return to their pre-pregnancy weight.