Dear Doctor, further to my previous query, I m travelling and was unable to visit a gynaec, it s my 6th day today, and I started on novelon because femilon was unavailable and the chemist advised that the composition is the same. I wanted to confirm with you, if this pill would be effective by the 29th of this month when my husband returns? Also, the 21 day cycle would end by 25 th july, and I do not want my next period before the 31 st of July. Kindly advice. Thanks . Regards.