... dysplasia. I was told to return in six months. I have been on Aviane for four years now. After the biopsy, I was in severe pain and bleeding for 24 hours. I have missed my period now for two months since the biopsy and have been taking aviane as scheduled. I took a pregnancy test and it was negative. Has anyone ever skipped their period on Aviane before or did the biopsy effect this?