Incidence of ovulation in young women.
D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008019:Life Style; D008598:Menstruation; D008991:Monitoring, Physiologic / Q000379:methods; D010060:Ovulation; D011276:Pregnanediol / Q000652:urine
D011276:Pregnanediol