adolescent atlases chorionicgonadotropin chorionicgonadotropins congresses developmentalbiology diseases endocrineaspects endocrineglands endocrinegynecology fertilizationinvitro first humanreproduction induction luteinizinghormone ovaries ovulationinduction pharmacology physiology pregnancy pregnancytrimester qp261 reproduction rhesusmonkey sexualbehavior therapeuticuse trimester wp540o9541991 wp540t8281994 wq205y45r1978