The evaluation of sex chromatin number of newborns of mothers using oral contraceptives prior to conception.
D003276:Contraceptives, Oral / Q000009:adverse effects*; D003278:Contraceptives, Oral, Hormonal / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D012728:Sex Chromatin / Q000187:drug effects*; D012744:Sex Ratio
D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal