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Induced acrosome reactions as fertility predictor
K Coetzee1, J Olmedo, C J Lombard
1Department of Obstetrics and Gynecology, University of Stellenbosch, Tygerberg, South Africa.
Journal of Assisted Reproduction and Genetics
|October 1, 1994
Summary
Sperm acrosome reaction tests do not reliably predict male fertility or in vitro fertilization success. However, exposure to oocyte-cumulus complexes significantly enhances sperm acrosome reaction inducibility.
Area of Science:
- Reproductive biology
- Spermatozoa function
- Assisted reproductive technology
Background:
- The acrosome reaction is crucial for fertilization.
- Assessing sperm function is vital for diagnosing male infertility.
- In vitro fertilization (IVF) success rates depend on sperm quality.
Purpose of the Study:
- To evaluate the predictive value of human sperm acrosome reaction rates and indices for male fertility.
- To correlate acrosome reaction outcomes with in vitro fertilization success.
- To analyze the impact of oocyte-cumulus complex exposure on sperm acrosome reaction induction.
Main Methods:
- Sperm samples from patients undergoing infertility treatment were analyzed.
- Acrosome reactions were assessed using FITC-conjugated Pisum sativum agglutinin on ethanol-permeabilized smears.
- Sperm acrosome reaction was induced using calcium ionophore A23187 (10 microM/ml).
Main Results:
- No significant correlation was observed between acrosome reaction rates/indices and in vitro fertilization outcomes.
- Oocyte-cumulus complexes did not affect spontaneous acrosome reactions.
- Exposure to oocyte-cumulus complexes significantly increased inducible acrosome reactions by 7.8% (SE = 3.1%).
Conclusions:
- Acrosome reaction rates and indices lack significant predictive value for male fertility or IVF success.
- Exposure to oocyte-cumulus complexes enhances the inducible sperm population, suggesting a role in natural fertilization processes.