The effect of maternal age, parity, fetal sex and season upon early intrauterine development.
D001835:Body Weight; D000013:Congenital Abnormalities / Q000209:etiology; D005260:Female; D005333:Fetus / Q000502:physiology*; D006128:Growth; D006801:Humans; D008297:Male; D008423:Maternal Age; D010298:Parity; D011247:Pregnancy; D012621:Seasons; D012737:Sex Factors