Spindle examination in unfertilized eggs using the polarization microscope can assist rescue ICSI.

Abstract:

:Rescue ICSI can induce a high rate of 3 pronuclei (PN) formation from double insemination in eggs already fertilized by IVF but lacking signs of normal pronuclear formation. This study was performed to determine whether the number of 3PN embryos could be reduced by using the polarization microscope for rescue intracytoplasmic sperm injection (ICSI). As a study group, after conventional insemination, 81 unfertilized mature oocytes from 11 couples were checked for the number of spindles using the polarization microscope. One spindle (82.7%) or two spindles (17.3%) were observed in this group. Rescue ICSI was only performed on the unfertilized oocytes showing one spindle. In the control group, 87 mature oocytes which lacked visualization of any fertilization signs were selected for rescue ICSI and none of them underwent observation of the spindle. After rescue ICSI, the normal fertilization rate in the study group was significantly higher than in the control (68.7% versus 43.7%; P=0.0032). The rate of 3PN or 4PN embryos was significantly decreased in the study group with one spindle compared with the group without observation of the spindle (4.5% versus 26.4%; P=0.0004).

journal_name

Reprod Biomed Online

authors

Moon JH,Son WY,Henderson S,Mahfoudh A,Dahan M,Holzer H

doi

10.1016/j.rbmo.2012.10.019

subject

Has Abstract

pub_date

2013-03-01 00:00:00

pages

280-5

issue

3

eissn

1472-6483

issn

1472-6491

pii

S1472-6483(12)00684-0

journal_volume

26

pub_type

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