Pulsatile Ovarian Fossa Ectopic and the 'Morning After' Pill

EDITORIAL COMMENT: This case report was accepted for publication mainly to remind readers that withdrawal haemorrhage does not exclude pregnancy, in-trauterine or extrauterine, when 'morning after' pills are prescribed. These patients also require an appropriately-timed HCG assay, oestrogen and/or progesterone assay or ultrasonography. The pulsatile nature of this ectopic gestation, whether ovarian or primary peritoneal, is unusual. Conjecture on aetiology is unwarranted without knowledge of the time in the menstrual cycle that morning after pills were taken.