Talwar, P P Increased risk of breakthrough bleeding when one oral-contraceptive tablet is missed. [electronic resource] - The New England journal of medicine May 1977 - 1236-7 p. digital Publication Type: Letter ISSN: 0028-4793 Subjects--Topical Terms: AdolescentAdultContraceptives, Oral--administration & dosageFemaleHumansPatient ComplianceUterine Hemorrhage--etiology