or your estrogen levels were high indicating ovulation?
There was one larger than the others but when I was there with the Dr. He did not seem too concerned but when they received the blood test back that's when the nurse left me a VM to tell me to change my protocol. I guess the one could have triggered the change.
i haven't gone through it but ganirelix is typically given to delay ovulation or maybe slow down follicle growth. When you went for your u/s did you have a large follicle(s) already that the dr thought might look like it could be released at some point soon?