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Effect of frequent ejaculation on semen characteristics in rams
The Veterinary Record
|March 20, 1976
Summary
Frequent ejaculation in Suffolk rams significantly reduces sperm count per ejaculate. After eight ejaculates, sperm numbers may become insufficient for fertilization, especially in ewes treated with progestagen.
Area of Science:
- Reproductive biology
- Animal science
- Veterinary medicine
Background:
- Understanding ram reproductive capacity is crucial for efficient sheep breeding programs.
- Frequent semen collection impacts sperm production and ejaculate quality in rams.
Purpose of the Study:
- To investigate the effects of repeated ejaculation on semen characteristics in Suffolk rams.
- To determine the threshold of sperm count per ejaculate critical for successful fertilization.
Main Methods:
- Sixteen Suffolk rams were subjected to repeated ejaculations over an eight-hour period in November.
- Collected ejaculates were analyzed for volume, sperm density, sperm count, motility, and abnormality percentage.
Main Results:
- Significant declines in ejaculate volume, sperm density, and sperm count were observed with successive collections.
- Sperm motility and the percentage of abnormal sperm remained unaffected by frequent ejaculation.
- Sperm count per ejaculate fell below fertilization requirements after the eighth collection.
Conclusions:
- Intensive semen collection protocols can deplete ram sperm reserves, potentially compromising fertility.
- The findings highlight the importance of managing ejaculation frequency to maintain optimal sperm numbers for breeding, particularly in ewes undergoing hormonal treatments like progestagen.