Letter: Birth defects and oral hormone preparations.
D000014:Abnormalities, Drug-Induced / Q000209:etiology*; D003276:Contraceptives, Oral / Q000009:adverse effects*; D004933:Esophageal Atresia / Q000139:chemically induced*; D005260:Female; D012739:Gonadal Steroid Hormones / Q000009:adverse effects*; D006801:Humans; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D011258:Pregnancy Tests
D003276:Contraceptives, Oral; D012739:Gonadal Steroid Hormones