The cervix and fertility control.
D000818:Animals; D002582:Cervix Mucus / Q000502:physiology; D002584:Cervix Uteri / Q000502:physiology*; D003267:Contraception; D005260:Female; D005298:Fertility; D006801:Humans; D010060:Ovulation; D013256:Steroids / Q000494:pharmacology
D013256:Steroids