Letter: Conisation and the minipill.
D001706:Biopsy; D002582:Cervix Mucus / Q000187:drug effects; D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal / Q000494:pharmacology; D005260:Female; D006801:Humans; D009654:Norsteroids; D011247:Pregnancy
D003276:Contraceptives, Oral; D003278:Contraceptives, Oral, Hormonal; D009654:Norsteroids