No abstract available
MeSH terms
-
Contraceptive Agents, Female / administration & dosage*
-
Contraceptives, Oral, Combined*
-
Ethinyl Estradiol / administration & dosage*
-
Female
-
Humans
-
Levonorgestrel / administration & dosage*
-
Pregnancy
Substances
-
Contraceptive Agents, Female
-
Contraceptives, Oral, Combined
-
Ethinyl Estradiol
-
Levonorgestrel