The incidence of side-effects with a low-oestrogen contraceptive pill.
D003276:Contraceptives, Oral / Q000009:adverse effects*; D003863:Depression / Q000139:chemically induced; D004997:Ethinyl Estradiol / Q000009:adverse effects*; D005260:Female; D006261:Headache / Q000139:chemically induced; D006801:Humans; D007989:Libido; D009640:Norethindrone / Q000009:adverse effects*
D003276:Contraceptives, Oral; D004997:Ethinyl Estradiol; D009640:Norethindrone