Erythema nodosum and contraceptive medication.
D003276:Contraceptives, Oral / Q000009:adverse effects*; D004893:Erythema Nodosum / Q000209:etiology*; D005260:Female; D006801:Humans; D008656:Mestranol / Q000009:adverse effects*; D009641:Norethynodrel / Q000009:adverse effects*
D003276:Contraceptives, Oral; D009641:Norethynodrel; D008656:Mestranol