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Changes in seminal parameters of ejaculates after repeated ejaculation.
1Institute of Sexology, Charles University, Prague/CSSR.
Andrologia
|January 1, 1988
Summary
Second ejaculates showed lower semen volume and reduced sperm velocity compared to the first. This suggests successive ejaculation may offer limited clinical benefit for treating male infertility.
Area of Science:
- Reproductive biology
- Andrology
- Human reproduction
Background:
- Understanding seminal fluid parameters is crucial for male fertility assessment.
- The impact of successive ejaculation on semen quality requires further investigation.
Purpose of the Study:
- To compare seminal fluid parameters between first and second ejaculates collected sequentially.
- To evaluate the clinical utility of successive ejaculation in male infertility management.
Main Methods:
- Masturbation was used for sample collection.
- Two ejaculates were collected from each participant with a 60-minute interval.
- Seminal fluid parameters including volume, sperm density, motility, velocity, and morphology were analyzed.
Main Results:
- Semen volume was significantly lower in the second ejaculate.
- Sperm density was higher in the second ejaculate for only 31% of participants.
- Sperm motility was comparable between ejaculates, but velocity was significantly lower in the second.
- The percentage of morphologically defective sperm remained similar in both specimens.
Conclusions:
- Successive ejaculation yields reduced semen volume and lower sperm velocity in the second sample.
- The clinical significance of successive ejaculation for treating male infertility appears limited.