Problems associated with the substitution of progesterone by orally active preparations.
D005260:Female; D006801:Humans; D010060:Ovulation / Q000502:physiology*; D011374:Progesterone / Q000502:physiology*; D013256:Steroids / Q000494:pharmacology*
D013256:Steroids; D011374:Progesterone
OVULATION/physiology; PROGESTERONE/physiology; STEROIDS/pharmacology