<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi im 36 with a history of polycystic ovary syndrome, for the last 5 years or more i have had regular periods on a 33 day cycle. Up until 4 months ago that is when my periods ceased. Almost 2 weeks ago our condom came of during sex so the following morning i had the e.C.pill but alao started my period the same mornin...does this increase the risk of having an extended period?  <response>: Hello, Thanks for the query to Chat Doctor. Forum. Contraceptive pills dont interfere with periodsas its extension. This is the P C O S, causing dysfunctional uterine bleeding. Besides, you also have scanty menstruation with amenorrhea as without bleeding for 4 months. If you are taking treatment of P C O S, well good. Otherwise, please consult a gynecologist and get his opinion regarding your disease. Good luck. 