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Sperm chromatin heterogeneity as an infertility factor
M E Ibrahim1, M A Moussa, H Pedersen
1Department of Obstetrics and Gynaecology, Faculty of Medicine, Kuwait University, Safat.
Archives of Andrology
|January 1, 1988
Summary
Semen analysis using the Acridine orange test (AOT) and hamster egg penetration test (HEPT) better identifies infertility causes than conventional semen analysis. Abnormal sperm chromatin is linked to early pregnancy loss.
Area of Science:
- Reproductive Biology
- Andrology
- Infertility Research
Background:
- Unexplained infertility and habitual abortion significantly impact reproductive outcomes.
- Conventional semen analysis (SA) has limitations in diagnosing the root causes of infertility.
- Sperm DNA integrity is crucial for successful fertilization and pregnancy.
Purpose of the Study:
- To compare the diagnostic efficacy of conventional SA, Acridine orange test (AOT), and zona-free hamster egg penetration test (HEPT) in infertile men and those with habitual abortions.
- To investigate the association between sperm chromatin heterogeneity and infertility or recurrent pregnancy loss.
- To identify the most discriminatory test for evaluating sperm quality in relation to reproductive failure.
Main Methods:
- Semen samples were collected from three groups: husbands of women with unexplained infertility (n=33), women with habitual abortion (n=36), and fertile donors (n=20).
- Samples underwent conventional semen analysis (SA), Acridine orange test (AOT) for sperm chromatin structure assay, and zona-free hamster egg penetration test (HEPT).
- Statistical analysis was performed to compare the discriminatory power of the three tests.
Main Results:
- The Acridine orange test (AOT) demonstrated the highest discriminatory power (p=0.0001), followed by the hamster egg penetration test (HEPT) (p=0.019).
- Sperm chromatin heterogeneity, detected by AOT, was most frequent in habitual abortion (39.4%) and unexplained infertility (16.4%) groups compared to donors (9.4%).
- Conventional semen parameters showed the least ability to discriminate between the study groups.
Conclusions:
- Abnormal sperm chromatin structure, as indicated by AOT, is a significant factor contributing to unexplained infertility and habitual abortion.
- AOT and HEPT are more effective than conventional SA in identifying sperm defects associated with reproductive failure.
- Assessing sperm chromatin integrity is essential for diagnosing and managing infertility and recurrent pregnancy loss.