DAY OF CONCEPTION IN RELATION TO LENGTH OF MENSTRUAL CYCLE. A STUDY OF 65 CONCEPTIONS RESULTING FROM ISOLATED COITUS.
D003075:Coitus; D005260:Female; D005306:Fertilization; D006801:Humans; D008597:Menstrual Cycle; D008598:Menstruation; D010507:Periodicity
COITUS; FERTILIZATION; MENSTRUATION; PERIODICITY