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Hope For Men With Nonobstructive Infertility
It has been thought that men with non-obstructive azoospermia (NOA), a lack of sperm in the semen not caused by an obstruction within the reproductive system, are poor candidates for IVF. Now, researchers writing in the open access journal Reproductive Biology and Endocrinology have shown that sperm from men with NOA and obstructive azoospermia (OA) are equally capable of producing embryos.
Nina Desai led a team of researchers from the Cleveland Clinic Foundation who carried out an in-depth analysis of intracytoplasmic sperm injection (ICSI) using frozen sperm taken from the testes of 44 men with OA and 17 men with NOA. They found that, although fertilization rates were slightly improved in the OA group, there were no significant differences in implantation rates or clinical pregnancy rates. According to Desai, "The high implantation rate per embryo transferred and the resultant live births attest to the quality of embryos being produced with both types of surgically retrieved sperm".