J. Anim Sci.
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J. Anim Sci. 1975. 40:1307-1315.
© 1975 American Society of Animal Science
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Recent Developments in Animal Reproduction Physiology and Endocrinology in Poland1

Romuald Stupnicki2

Abstract

Regulatory functions of the hypothalamus have been extensively studied in sheep. By using various surgical, electrophysiological and biochemical methods hypothalamic areas involved in the control of ovulation, sexual behavior and lactation have been identified and localized.

Studies on reproductive endocrinology in cattle, employing modem analytical methods, resulted in working out a pattern of changes in plasma levels of some pituitary and steroid hormones, including protein binding of the latter ones, throughout the reproductive cycle of the female.

In a study on transplantation of sheep ova it has been shown that their in vitro storage for several days, followed by a successful fertilization, is possible.

Another line of research has been the reproductive physiology of the bull, boar and ram. A detailed time-pattern analysis of the copulation process has been done with respect to the animal's behavior, semen transport and changes in some physiologic parameters and blood constituents. It has been also shown that even severe underfeeding of the male does not significantly alter its reproductive performance.

Footnotes

1 Presented as part of a Symposium, Animal Science Research in Some Eastern European Countries, July 31, 1974, during the 66th Annual Meeting of the A.S.A.S., at the University of Maryland, College Park.

2 Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 05-110 Jablonna, Poland






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Copyright © 1975 by the American Society of Animal Science.