Letter: Acne stimulation by Ovral.
D000152:Acne Vulgaris / Q000139:chemically induced*; D000293:Adolescent; D000328:Adult; D003276:Contraceptives, Oral / Q000009:adverse effects*; D004997:Ethinyl Estradiol / Q000009:adverse effects*; D005260:Female; D006801:Humans; D009644:Norgestrel / Q000009:adverse effects*; D011247:Pregnancy
D003276:Contraceptives, Oral; D009644:Norgestrel; D004997:Ethinyl Estradiol