The new progestogens.
Elstein
M
M
Department of Obstetrics and Gynaecology, University Hospital of South Manchester, West Didsbury, UK.
Eyong
E
E
D003280:Contraceptives, Oral, Synthetic; D005260:Female; D006801:Humans; D045167:Progesterone Congeners
D003280:Contraceptives, Oral, Synthetic; D045167:Progesterone Congeners