Author(s): Borges E Jr, de Almeida Ferreira Braga, de Sousa Bonetti TC, Iaconelli A Jr, Franco JG Jr
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Abstract OBJECTIVE: To evaluate the effect of artificial oocyte activation (AOA) on intracytoplasmic sperm injection (ICSI) cycles using surgically retrieved sperm. DESIGN: Laboratory study. SETTING: Fertility/assisted fertilization center. PATIENT(S): Couples undergoing surgical sperm retrieval for ICSI (n = 204). INTERVENTION(S): Application of calcium ionophore A23187 for AOA. MAIN OUTCOME MEASURE(S): Cycles were divided into experimental groups according to the origin of the sperm used for injection and the type of azoospermia:  testicular sperm aspiration in nonobstructive-azoospermic patients (TESA-NOA group, n = 58),  TESA in obstructive-azoospermic patients (TESA-OA group, n = 48),  and percutaneous epididymal sperm aspiration in obstructive-azoospermic patients (PESA-OA, n = 98). For each experimental group, cycles where AOA was applied (subgroup: activation) were compared with cycles in which AOA was not applied (subgroup: control). The fertilization, high-quality embryo, implantation, and pregnancy rates were compared among the subgroups. RESULT(S): For patients undergoing TESA, AOA did not improve ICSI outcomes for either type of azoospermia. However, for cases in which the injected sperm were retrieved from the epididymis, a statistically significantly increased rate of high-quality embryos was observed with AOA. CONCLUSION(S): Artificial oocyte activation may improve ICSI outcomes in azoospermic patients when epididymal, but not testicular spermatozoa, are injected.
This article was published in Fertil Steril
and referenced in Human Genetics & Embryology