Smith, D H Assessment of ovulation by ultrasound and estradiol levels during spontaneous and induced cycles. [electronic resource] - Fertility and sterility Apr 1980 - 387-90 p. digital Publication Type: Journal Article ISSN: 0015-0282 Subjects--Topical Terms: Clomiphene--pharmacologyEstradiol--bloodFemaleGonadotropins, Pituitary--pharmacologyHumansMenstruationOvarian FollicleOvulation InductionPregnancyTime FactorsUltrasonography