There is no definite number define for IVF cycles. But a woman can opt minimum 9 cycles of IVF to get pregnancy. You need to have patience when you are going for IVF treatment so that you can achieve a good result. The number of IVF cycles increase the chance of IVF success rates.
In most of the cases, IVF procedure needs to be performed at least 3 cycles on average. I was lucky enough to have successful pregnancy at the end of the first IVF cycle. Success rates increase with the attempt of the IVF procedure.