For performing In Vitro Fertilization procedure, there are 2 follicles of 16-20 mm and at least 2 more that are 13-15 mm in size are required. This requirement of follicles vary from one case to another. Therefore, depending on every case, there can be a very good IVF success rate with even just one follicle. In general, a woman is considered to ovulate more than one follicle in 24 hours.
IVF procedure requires good quality and number of follicles. Our doctor had mentioned that 15 to 30 number of antral follicles are a good number for successful IVF treatment of couples. Proper tests are done to find out the required number of follicles in the body of the woman.