kitty chan,
when i was doing my soiui, my eggs were not growing well. from puregon 100iu, doctor increased to 200iu, though 200iu is common for IVF but consider high dosage for SOIUI. so i started to take 10 egg whites daily to prevent bloatedness/OHSS.(dun ask me how I did it, but I always make sure I finish one tray of eggs everyday.) Indirectly, my eggs started to grow very fast at 3.5mm per day, until i have to convert my SOIUI cycle to IVF. Most importantly, dun get too stressed over the growing rate of eggs.. try to relax as much as possible. As your dosage has been increased to 450iu, I would advise you to start taking taking whites or Immunocal regularly to prevent bloatedness.