alexa Fertilization, pregnancy and embryo implantation rates after ICSI in cases of obstructive and non-obstructive azoospermia.
Genetics

Genetics

Journal of Aging Science

Author(s): De Croo I, Van der Elst J, Everaert K, De Sutter P, Dhont M

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Abstract The aetiology of azoospermia can be grossly divided into obstructive and non-obstructive causes. Although in both cases testicular spermatozoa can be used to treat male fertility, it is not well established whether success rates following intracytoplasmic sperm injection (ICSI) are comparable. Therefore, a retrospective analysis of fertilization, pregnancy and embryo implantation rates was performed following ICSI with testicular spermatozoa in obstructive or non-obstructive azoospermia. In total, 193 ICSI cycles were carried out with freshly retrieved testicular spermatozoa; in 139 cases of obstructive and 54 cases of non-obstructive azoospermia. The fertilization rate after ICSI with testicular spermatozoa in non-obstructive azoospermia was significantly lower than in obstructive azoospermia (67.8\% versus 74.5\%; P = 0.0167). Within the non-obstructive group, the fertilization rate in the group of maturation arrest (47.0\%) was significantly lower than in case of Sertoli cell-only (SCO) syndrome (71.2\%) or germ cell hypoplasia (79. 5\%). Embryo quality on day 2 after ICSI was similar for all groups. Pregnancy rates per transfer between obstructive (36.8\%) and non-obstructive groups (36.7\%) were similar. In cases of maturation arrest the pregnancy rate per transfer was lowest (20.0\%) although not significantly different from SCO syndrome or hypoplasia groups. Embryo implantation rates were not different between the obstructive (19.6\%) and non-obstructive groups (25.8\%), and were lowest in cases of germ cell hypoplasia (15.8\%). This retrospective analysis shows that although fertilization rate after ICSI with testicular spermatozoa in non-obstructive azoospermia is significantly lower than in obstructive azoospermia, pregnancy and embryo implantation rates are similar.
This article was published in Hum Reprod and referenced in Journal of Aging Science

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