AGE AND PARTURITION IN PRIMIGRAVIDAE.
D000375:Aging; D002585:Cesarean Section; D036861:Delivery, Obstetric; D004420:Dystocia; D005260:Female; D005313:Fetal Death; D006801:Humans; D007226:Infant Mortality; D007743:Labor, Obstetric; D008428:Maternal Mortality; D011247:Pregnancy; D011248:Pregnancy Complications; D013223:Statistics as Topic; D014427:Twins
AGING; CESAREAN SECTION; DELIVERY; DYSTOCIA; FETAL DEATH; INFANT MORTALITY; LABOR; MATERNAL MORTALITY; PREGNANCY; PREGNANCY COMPLICATIONS; STATISTICS; TWINS