[ON CONCEPTIONAL DIFFICULTIES IN FERTILE MARRIED COUPLES].
D005260:Female; D005298:Fertility; D005306:Fertilization; D006801:Humans; D007246:Infertility; D007247:Infertility, Female; D007248:Infertility, Male; D010060:Ovulation
FERTILITY; OVULATION; STERILITY, FEMALE; STERILITY, MALE
UBER EMPFAENGNISSCHWIERIGKEITEN BEI FERTILEN EHEPARTNERN.