Oocyte overripeness relation to multiple pregnancy. An epidemiologic study.
D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008423:Maternal Age; D008598:Menstruation; D010060:Ovulation; D010063:Ovum / Q000254:growth & development*; D011247:Pregnancy; D011272:Pregnancy, Multiple; D013997:Time Factors