Recent developments in hormonal contraception.
Drey
Eleanor A
EA
Department of Obstetrics, Gynecology and Reproductive Sciences, San Francisco General Hospital, University of California, San Francisco, CA 94110, USA.
Darney
Philip D
PD
D003278:Contraceptives, Oral, Hormonal; D005260:Female; D006801:Humans; D011247:Pregnancy
D003278:Contraceptives, Oral, Hormonal