Comparison of the sperm aneuploidy rate in severe oligozoospermic and oligozoospermic men and its relation to intracytoplasmic sperm injection outcome.
OBJECTIVE
To determine the incidence of disomy and diploidy for chromosomes 18, X, and Y in the sperm samples of severe oligozoospermic (<5 x 10(6) spermatozoa/mL) and oligozoospermic (5-20 x 10(6) spermatozoa/mL) men undergoing intracytoplasmic sperm injection (ICSI) and to evaluate the influence of sperm aneuploidy on pregnancy outcome.


METHODS
Prospective study.


METHODS
Infertility clinic and genetic laboratory.


METHODS
Fifteen patients with severe oligozoospermia, 15 patients with oligozoospermia, and 10 normal fertile donors.


METHODS
Fluorescence in-situ hybridization (FISH) performed on sperm samples.


METHODS
The frequency of disomy and diploidy for chromosomes 18, X, and Y was analyzed using FISH, and the clinical outcome after ICSI was correlated.


RESULTS
Significantly greater frequencies of XY, YY disomy and diploidy were observed in severe oligozoospermic men compared with oligozoospermic and normozoospermic men. Although the fertilization rate was similar, the pregnancy rate was higher in the group with oligozoospermia versus severe oligozoospermia.


CONCLUSIONS
This study demonstrated the presence of an elevated sperm aneuploidy rate in patients with low semen quality. Additionally, the data show a negative influence of sperm chromosome abnormalities on ICSI outcome.
Nagvenkar
Punam
P
Jaslok Hospital and Research Centre, Mumbai, India.
Zaveri
Kusum
K
Hinduja
Indira
I
D000328:Adult; D000782:Aneuploidy; D016009:Chi-Square Distribution; D005260:Female; D006801:Humans; D017404:In Situ Hybridization, Fluorescence / Q000706:statistics & numerical data; D008297:Male; D009845:Oligospermia / Q000453:epidemiology / Q000235:genetics*; D011247:Pregnancy; D011256:Pregnancy Outcome / Q000453:epidemiology / Q000235:genetics*; D018873:Pregnancy Rate; D011446:Prospective Studies; D020554:Sperm Injections, Intracytoplasmic / Q000706:statistics & numerical data*; D013094:Spermatozoa / Q000502:physiology*