Follicle growth

Cait

We had our second scan this morning, stims day 12, it showed 3 mature follicles (18-20mm) and lots of slightly smaller ones so I've been given more meds and called back in Thursday morning. I'm worried about the bigger ones over cooking or the smaller ones not getting big enough. Has anyone had a similar experience? I'm on 150iu of Menopur in the evening and 0.25 of Cetrotide in the morning.