全文获取类型
收费全文 | 909篇 |
免费 | 2篇 |
国内免费 | 1篇 |
专业分类
儿科学 | 9篇 |
妇产科学 | 620篇 |
基础医学 | 4篇 |
口腔科学 | 9篇 |
临床医学 | 124篇 |
内科学 | 25篇 |
皮肤病学 | 3篇 |
神经病学 | 1篇 |
特种医学 | 6篇 |
外科学 | 23篇 |
综合类 | 5篇 |
预防医学 | 75篇 |
眼科学 | 3篇 |
药学 | 1篇 |
中国医学 | 1篇 |
肿瘤学 | 3篇 |
出版年
2013年 | 6篇 |
2011年 | 21篇 |
2009年 | 12篇 |
2008年 | 6篇 |
2007年 | 4篇 |
2006年 | 6篇 |
2005年 | 6篇 |
2003年 | 6篇 |
2002年 | 4篇 |
2001年 | 10篇 |
2000年 | 9篇 |
1999年 | 62篇 |
1998年 | 60篇 |
1997年 | 51篇 |
1996年 | 27篇 |
1995年 | 34篇 |
1994年 | 37篇 |
1993年 | 23篇 |
1992年 | 20篇 |
1991年 | 25篇 |
1990年 | 11篇 |
1989年 | 23篇 |
1988年 | 22篇 |
1987年 | 14篇 |
1986年 | 25篇 |
1985年 | 35篇 |
1984年 | 21篇 |
1983年 | 20篇 |
1982年 | 28篇 |
1981年 | 27篇 |
1980年 | 19篇 |
1979年 | 22篇 |
1978年 | 8篇 |
1977年 | 15篇 |
1976年 | 17篇 |
1975年 | 7篇 |
1974年 | 6篇 |
1973年 | 14篇 |
1972年 | 11篇 |
1971年 | 10篇 |
1970年 | 16篇 |
1969年 | 11篇 |
1968年 | 4篇 |
1967年 | 4篇 |
1966年 | 7篇 |
1965年 | 5篇 |
1961年 | 15篇 |
1960年 | 14篇 |
1958年 | 11篇 |
1957年 | 9篇 |
排序方式: 共有912条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
Spontaneous uterine rupture during subsequent pregnancy following non-excision of an interstitial ectopic gestation 总被引:2,自引:1,他引:1
5.
6.
7.
Single pre-delivery symphysis-fundal height measurement as a predictor of birthweight and multiple pregnancy 总被引:1,自引:0,他引:1
8.
Randomised trial comparing the upright and supine positions for the second stage of labour 总被引:2,自引:1,他引:1
P. R. de Jong Senior Specialist R. B. Johanson Senior Lecturer P. Baxen Chief Professional Nurse V. D. Adrians Senior Professional Nurse S. van der Westhuisen Lecturer P. W. Jones Professor 《BJOG : an international journal of obstetrics and gynaecology》1997,104(5):567-571
Objective To assess the maternal and neonatal effects of upright compared with recumbent positions during delivery, in terms of defined outcome variables.
Design A randomised controlled trial.
Setting St Monica's Nursing Home, a midwife based maternity unit in Cape Town, South Africa.
Participants Five hundred and seventeen women of low obstetrical risk assigned to deliver at the nursing home.
Results The trial showed that women who adopted the upright posture for delivery experienced less pain, perineal trauma and fewer episiotomies than those who delivered in the supine position.
Conclusion The data suggest that in women of low obstetrical risk, choice of posture during delivery may be encouraged. 相似文献
Design A randomised controlled trial.
Setting St Monica's Nursing Home, a midwife based maternity unit in Cape Town, South Africa.
Participants Five hundred and seventeen women of low obstetrical risk assigned to deliver at the nursing home.
Results The trial showed that women who adopted the upright posture for delivery experienced less pain, perineal trauma and fewer episiotomies than those who delivered in the supine position.
Conclusion The data suggest that in women of low obstetrical risk, choice of posture during delivery may be encouraged. 相似文献
9.
10.
Jonathan D. Adachi Professor Everett J. Sargeant Professor Margaret A. Sagle Associate Professor David Lament Assistant Professor Paul D. Fawcett Obstetrician Gynaecologist William G. Bensen Associate Clinical Professor Matthew McQueen Chief Director Professor Darius J. Nazir Clinical Chemist Associate Professor Charles H. Goldsmith Professor Head 《BJOG : an international journal of obstetrics and gynaecology》1997,104(1):64-70
Objective To assess the effects of medroxyprogesterone acetate on bone density in women who have had a hysterectomy
Design Randomised, double-blind, placebo-controlled trial of medroxyprogesterone acetate 10 mg, 20 mg or placebo as an adjunct to oestrogen therapy.
Participants One hundred and twenty-three women, aged 18 to 45 years and currently receiving daily oestrogen, who presented at a university-based rheumatology practice.
Interventions The women were randomly assigned to receive either medroxyprogesterone acetate 10 mg, 20 mg or placebo daily beginning on day 15 of each month for one year. Forty-one women were randomised into each group.
Main outcome measure The primary outcome measurement was the percentage of change from baseline in bone mineral density of the lumbar spine (L2–L4). Secondary outcome measures included differences in femoral neck bone density, cholesterol and triglyceride levels between groups.
Results At one year, change in bone mineral density did not differ between either the treatment or placebo groups. Medroxyprogesterone acetate 20 mg and 10 mg led to statistically significant reductions in very low density lipoprotein cholesterol, total triglycerides, and very low density lipoprotein triglycerides when compared with placebo. Medroxyprogesterone acetate 20 mg also led to a statistically significant reduction in high density lipoprotein cholesterol, high density lipo-protein-2 cholesterol, and high density lipoprotein-2 triglycerides.
Conclusions Medroxyprogesterone acetate at either dose as an adjunct to oestrogen did not improve bone mineral density at one year when compared with placebo. Medroxyprogesterone acetate 10 mg may not adversely affect lipids. Medroxyprogesterone acetate 20 mg, however, did reduce high density lipoprotein cholestrol and therefore may increase cardiovascular risk. 相似文献
Design Randomised, double-blind, placebo-controlled trial of medroxyprogesterone acetate 10 mg, 20 mg or placebo as an adjunct to oestrogen therapy.
Participants One hundred and twenty-three women, aged 18 to 45 years and currently receiving daily oestrogen, who presented at a university-based rheumatology practice.
Interventions The women were randomly assigned to receive either medroxyprogesterone acetate 10 mg, 20 mg or placebo daily beginning on day 15 of each month for one year. Forty-one women were randomised into each group.
Main outcome measure The primary outcome measurement was the percentage of change from baseline in bone mineral density of the lumbar spine (L2–L4). Secondary outcome measures included differences in femoral neck bone density, cholesterol and triglyceride levels between groups.
Results At one year, change in bone mineral density did not differ between either the treatment or placebo groups. Medroxyprogesterone acetate 20 mg and 10 mg led to statistically significant reductions in very low density lipoprotein cholesterol, total triglycerides, and very low density lipoprotein triglycerides when compared with placebo. Medroxyprogesterone acetate 20 mg also led to a statistically significant reduction in high density lipoprotein cholesterol, high density lipo-protein-2 cholesterol, and high density lipoprotein-2 triglycerides.
Conclusions Medroxyprogesterone acetate at either dose as an adjunct to oestrogen did not improve bone mineral density at one year when compared with placebo. Medroxyprogesterone acetate 10 mg may not adversely affect lipids. Medroxyprogesterone acetate 20 mg, however, did reduce high density lipoprotein cholestrol and therefore may increase cardiovascular risk. 相似文献