Hum. Reprod. Advance Access originally published online on February 23, 2006
Human Reproduction 2006 21(7):1787-1790; doi:10.1093/humrep/del049
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Does the presence of nuclear vacuoles in human sperm selected for ICSI affect pregnancy outcome?
1 IVF Unit, Department of Obstetrics and Gynaecology, Sapir Medical Center, Meir Hospital, Kfar Saba 2 Male Fertility Laboratory, Faculty of Life Sciences, Bar-Ilan University, Ramat Gan 3 Department of Obstetrics and Gynaecology, IVF Unit, Hillel-Yaffe Medical Center, Hadera and 4 IVF Unit, Herzliya Medical Center, Herzliya-on-the-Sea, Israel
5 To whom correspondence should be addressed at: Male Fertility Laboratory, Faculty of Life Sciences, Bar-Ilan University, Ramat Gan 52900, Israel. E-mail: bartoob{at}mail.biu.ac.il
BACKGROUND: To verify whether or not microinjection of sperm with a normal nuclear shape but large vacuoles affects IVFICSI pregnancy outcome. METHODS: A comparative study testing IVF outcome parameters of IVFICSI, based on morphological selection of spermatozoa with normal nuclei against those based on microinjection of sperm with a normal nuclear shape but large vacuoles. An experimental group, including 28 IVFICSI cycles, where only embryos obtained from microinjection of spermatozoa with a normal nuclear shape but large vacuoles were transferred, was matched with a control group, including 28 IVFICSI cycles, where only embryos obtained from microinjection of spermatozoa with a strictly defined morphologically normal nuclear shape and content were transferred. The main outcome was IVFICSI pregnancy rate. RESULTS: The experimental group exhibited a significantly lower pregnancy rate per cycle and significantly higher abortion rate per pregnancy compared to the control group (18 versus 50%, and 80 versus 7%, respectively, P = 0.01). CONCLUSION: Microinjection of vacuolated sperm appears to reduce the pregnancy rate and appears to be associated with early abortion.
Key words: IVFICSI/IVF pregnancy outcome/vacuolated spermatozoa