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Sperm survival in the genital tract of the mare

Published online by Cambridge University Press:  27 March 2009

John Burkhardt
John Burkhardt
Affiliation:
(Animal Health Trust), The Equine Research Station, Balaton Lodge, Newmarket
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Extract

1. Seven matings in which there were sperm survival times of 66–76 hr. in a mixed group of pony mares resulted in seven pregnancies. Of six matings with an interval of 90–100 hr., five proved pregnant. One mare, mated with an interval of 126–138 hr., also became pregnant.

2. Where pregnancy urine extract is injected to bring about ovulation, the injection-ovulation interval can be accurately forecast at 40–48 hr. If the interval is longer the follicle was not sufficiently advanced to warrant injection, if shorter the follicle would have ovulated naturally in the same time.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 39 , Issue 2 , April 1949 , pp. 201 - 203
Copyright
Copyright © Cambridge University Press 1949

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References

REFERENCES

Day, F. T. (1942). J. Agric. Sci. 32, 108.CrossRefGoogle Scholar
Hammond, J. (1938). Trans. Yorks. Agric. Soc. 95, 11.Google Scholar