Menstrual cycles shortly after menarche in European and Bantu  girls. II. Endocrine and cytologic aspects.
D000293:Adolescent; D000353:Africa, Southern; D044383:Black People; D005260:Female; D006801:Humans; D008598:Menstruation; D009426:Netherlands; D010060:Ovulation; D011276:Pregnanediol / Q000652:urine*; D044465:White People
D011276:Pregnanediol