I just completed 11 days of stims (150IU of Menopur & 20units Suprefact) during all of my monitoring appointments I had 35+ follies. By day 10 I had 13 that were mature ranging between 15-22 and the rest (approx 15) around or under 10. I pulled the trigger (7500IU HCG) 36 hours before retrieval. At retrieval, there were only 3 mature follies and approx 15 under 10. What happened to my other follies between my last monitoring appointment to retrieval? Its not that they were there and didn't contain an egg, they just weren't there anymore. My doctor even said during the procedure it didn't add up.