Hormonal pregnancy tests and spina bifida.
D000014:Abnormalities, Drug-Induced; D004338:Drug Combinations; D004997:Ethinyl Estradiol / Q000009:adverse effects*; D005003:Ethisterone / Q000009:adverse effects*; D005260:Female; D005865:Gestational Age; D006728:Hormones / Q000009:adverse effects; D006801:Humans; D008431:Maternal-Fetal Exchange; D009640:Norethindrone / Q000009:adverse effects*; D011247:Pregnancy; D011258:Pregnancy Tests / Q000009:adverse effects*; D016135:Spinal Dysraphism / Q000139:chemically induced*
D004338:Drug Combinations; D006728:Hormones; D004997:Ethinyl Estradiol; D005003:Ethisterone; D009640:Norethindrone