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Changes in human sperm chromatin stability during preparation for in-vitro fertilization
L Rosenborg1, K M Rao, L Björndahl
1Department of Obstetrics and Gynecology, Huddinge University Hospital, Sweden.
International Journal of Andrology
|August 1, 1990
Summary
Sperm preparation for in-vitro fertilization (IVF) showed minimal impact on sperm chromatin stability. These minor changes during sperm preparation do not appear to affect IVF success rates or pregnancy outcomes in infertile patients.
Area of Science:
- Reproductive Biology
- In-Vitro Fertilization
- Sperm Analysis
Background:
- Sperm preparation is a critical step in assisted reproductive technologies like in-vitro fertilization (IVF).
- Understanding the impact of preparation techniques on sperm quality, specifically chromatin stability, is essential for optimizing IVF outcomes.
Purpose of the Study:
- To investigate the effects of sperm preparation methods on sperm chromatin stability.
- To assess the relationship between sperm chromatin stability and in-vitro fertilization (IVF) success rates.
Main Methods:
- Sperm samples from infertile patients undergoing IVF were prepared using the swim-up technique with two different media (Ham's F-10 or Earle's balanced salt solution).
- Sperm chromatin stability was evaluated using sodium dodecyl sulphate (SDS) and SDS-disodium ethylene diamine tetraacetate (SDS-EDTA) exposure.
- Sperm motility, morphology, fertilization rates, and pregnancy occurrences were analyzed in relation to chromatin stability.
Main Results:
- Sperm preparation via swim-up did not significantly alter sperm chromatin stability immediately after preparation or at the time of insemination.
- Sperm chromatin stability showed a tendency to increase over time, irrespective of preparation method or medium.
- No correlation was observed between sperm chromatin stability, temperature-induced decondensation, and IVF success (fertilization rates or pregnancies).
Conclusions:
- Sperm preparation techniques for IVF result in only minor, clinically insignificant changes in sperm chromatin stability.
- The findings suggest that for semen of good quality, variations in chromatin stability during preparation do not negatively impact IVF treatment success.