Comparison and outcomes of nonobstructive azoospermia patients with different etiology undergoing MicroTESE and ICSI treatments

Etiology may be an effective prognostic factor for SRR in NOA patients. NOA of definite etiology, such as cryptorchidism, has high SRR, while idiopathic NOA, the most common type of NOA, has the lowest SRR. Using of frozen thawed sperm from MicroTESE had similar pregnant outcome to that of fresh sperm, so cryopreservation of testicular sperm seems to be more suitable and of great benefit in these cases and good results can also be expected when oocyte retrieval and ICSI are not performed at the same time.