Hi MaryAnn!
I've been on Gonal F and I've been on Repronex.Gonal F is more expensive, but I don't really remember some really good sized follies with it. Repronex has worked well for me - producing a good mature follie, but my RE has not been very aggressive with my tx. Like Holleigh, I take chlomid for the 5 days. I take my Repronex after that, 1 am a night every other night for 3 days and then depending on size, they increase meds. I think it really has to do with the RE- how aggressive he wants your tx to be.
Good Luck!