I've been using the GNC Fertility Blend for Women. I have only used it one cycle so far, but it really seemed to regulate me. My cycles before were irregular. Sometimes I would ovulate on cd 12, other times cd 15. My cycles were anywhere from 24-29 days. My first cycle on this, O'd on cd 14 and AF arrived on cd 28. My temps also weren't all over the chart this month, I had a clear thermal shift, and a +opk to confirm I O'd. I am now on cycle 2 using this, and am hoping for that bfp this month :) . Hope this helps.