Outcome of conventional IVF and ICSI on sibling oocytes in the case of isolated teratozoospermia.
OBJECTIVE
To reevaluate the effect of isolated teratozoospermia on IVF and determine if there was any therapeutic benefit to isolated teratozoospermia by ICSI, since there are no widely accepted criteria for the treatment technique about isolated teratozoospermia.


METHODS
A total of 441 couples with >20 million and progressive motility >30 % sperm undergoing their first IVF/ICSI cycle were included in the study between 2008 and 2010, for whom at least 8 oocytes were retrived. Isolated teratozoospermia was diagnosed in 183 of the included couples, and the rest couples (normal sperm morphology) were studied as control. Sibling oocytes were randomized to be inseminated either by ICSI or IVF. Fertilization rate, embryo quality, pregnancy rate, implantation rate and spontaneous abortion rate were assessed.


RESULTS
There was no difference in the percentage of eggs fertilized, implantation rate, pregnancy rate and spontaneous abortion rate between conventional IVF and ICSI regardless of the percentage of normal morphology. The day 3 embryonic morphology and rate of development were not different despite the insemination method and percentage of normal morphology.


CONCLUSIONS
Because isolated teratozoospermia did not influence the major indices of IVF and the unnecessary use of ICSI is time-consuming, costly and potential risks, couples with isolated teratozoospermia need not be subjected to ICSI.
Department of Obstetrics and Gynecology, Center of Reproductive Medicine, The West China Second University Hospital, Sichuan University, Sichuan, People's Republic of China.
Wei
W
Fan
Shang Wei
SW
Li
Lei
L
Li
Zhongying
Z
Huang
Qianhong
Q
Ma
Yan
Y
Wang
Zhun
Z
Xiao
D000022:Abortion, Spontaneous / Q000473:pathology; D016022:Case-Control Studies; D048430:Cell Shape; D010064:Embryo Implantation; D004622:Embryo, Mammalian / Q000166:cytology; D047108:Embryonic Development; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D007248:Infertility, Male; D008297:Male; D054315:Oocyte Retrieval; D009865:Oocytes / Q000166:cytology* / Q000254:growth & development; D011247:Pregnancy; D011256:Pregnancy Outcome; D018873:Pregnancy Rate; D015203:Reproducibility of Results; D012189:Retrospective Studies; D013076:Sperm Count; D020554:Sperm Injections, Intracytoplasmic / Q000379:methods*; D013081:Sperm Motility; D013094:Spermatozoa / Q000166:cytology*; D013997:Time Factors; D016896:Treatment Outcome