Conception control by long-acting progestogens: preliminary report.
D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D005260:Female; D005306:Fertilization; D006801:Humans; D011372:Progestins
D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D011372:Progestins
CONTRACEPTIVES, ORAL; PROGESTATIONAL HORMONES