title: PREGNANCY FOLLOWING WITHDRAWAL FROM ORAL CONTRACEPTIVE MEASURES.
mesh_terms: D001699:Biometry; D003267:Contraception; D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D004358:Drug Therapy; D005260:Female; D006801:Humans; D008656:Mestranol; D009640:Norethindrone; D011247:Pregnancy; D013223:Statistics as Topic
chemical_list: D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D008656:Mestranol; D009640:Norethindrone
keywords: CONTRACEPTIVES, ORAL; DRUG THERAPY; MESTRANOL; NORETHINDRONE; PREGNANCY; STATISTICS