Letter: Hormonal pregnancy tests and congenital malformations.
D000014:Abnormalities, Drug-Induced; D004967:Estrogens / Q000009:adverse effects*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011258:Pregnancy Tests; D011374:Progesterone / Q000009:adverse effects*
D004967:Estrogens; D011374:Progesterone