共 50 条
- [35] Factors influencing relative weights of placenta and newborn infant - Maternal haemoglobin and blood pressure should have been regarded as continuous variables BRITISH MEDICAL JOURNAL, 1997, 315 (7121): : 1542 - 1542
- [38] Analysis of the causes and influencing factors of fetal loss in advanced maternal age: a nested case-control study BMC Pregnancy and Childbirth, 21