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Human Reproduction, Vol 12, 1214-1217, Copyright © 1997 by Oxford University Press

ARTICLES

Effect of abnormal sperm head morphology on the outcome of intracytoplasmic sperm injection in humans

I Tasdemir, M Tasdemir, S Tavukcuoglu, S Kahraman and K Biberoglu
Metropol Florence Nightingale, Department of Obstetrics and Gynecology, Istanbul, Turkey.

The present study was designed to determine the efficacy of intracytoplasmic sperm injection (ICSI) using spermatozoa with abnormal head morphology in 17 cases with total teratozoospermia. A total of 160 oocytes were retrieved and 144 metaphase II oocytes were injected. The fertilization and cleavage rates were 50.7 and 93.2% respectively. Fertilization failure occurred in two couples. A total of 54 embryos were transferred and pregnancy rates per initiated and per embryo transfer cycle were 17.6 and 20.0% respectively, while the clinical pregnancy rates per initiated and embryo transfer cycle were 11.8 and 13.3%. The implantation rate was 3.7% (2/54). Out of two pregnancies achieved, one resulted in abortion in the first trimester. The ongoing pregnancy rates per initiated and embryo transfer cycle were 5.88% (1/17) and 6.6% (1/15) respectively. Although the implantation and ongoing pregnancy rates are very low, ICSI seems to be the only treatment modality in cases where teratozoospermia was total with 100% abnormal head morphology.
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H. Schmiady, W. Schulze, I. Scheiber, and B. Pfuller
High rate of premature chromosome condensation in human oocytes following microinjection with round-headed sperm: Case report
Hum. Reprod., May 1, 2005; 20(5): 1319 - 1323.
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