J. Anim Sci.
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J. Anim Sci. 1971. 33:799-802.
© 1971 American Society of Animal Science
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Anatomical and Histological Observations on Reproductive Organs in Superovulated Calves1, 2,

L. L. Larson, G. E. Seidel, Jr.3 and R. H. Foote

Cornell University, Ithaca 14850

Abstract

Histological and anatomical measurements of ovaries, oviducts, uteri, pituitaries and adrenals are presented for Holstein calves superovulated with PMSG and LH at 0, 1 and 2 months of age. Most large differences between groups of calves were related to age rather than to superovulatory treatment, but ovarian weight and uterine gland proliferation were affected by both. There was a marked increase in uterine gland proliferation between 0 and 2 months of age and a further increase after 2-month-old calves were under the influence of progesterone for 5 to 20 days as a result of extensive luteal tissue formation following superovulation. The average CL weight 3, 10, 15 and 20 days after LH administration was 0.9, 2.8, 2.6 and 1.1 g, respectively. Luteal tissue 20 days after LH injection was extremely variable, with both functional and regressing CL present in the same calf.

Most anatomical measurements were positively correlated with calf weight (P<.01) and many of these measurements were significantly correlated among themselves. Uterine weight was correlated with uterine gland proliferation, r=0.74.

Footnotes

1 Department of Animal Science.

2 Supported in part by Grant HD 03471 from the National Institute of Child Health and Human Development. The PMSG was kindly supplied by Dr. Lindsay of Ayerst Laboratories and the PLH by Dr. Trout of Armour-Baldwin Laboratories.

3 Present address: Department of Anatomy, Harvard Medical School, Boston, Massachusetts 02115.






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Copyright © 1971 by the American Society of Animal Science.