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Plasma progesterone in mares showing oestrus during early pregnancy

Tomasgard, G.; Benjaminsen, E.

Nordisk Veterinaermedicin 27(11): 570-574

1975

ISSN/ISBN: 0029-1579
PMID: 1196852
Document Number: 92666
Sixtyfour mares were examined 3 and 6 weeks after mating. Progesterone was measured in 22 mares 3 weeks after mating in order to see if this could be of any help in the oestrous diagnosis. None of the pregnant mares had plasma progesterone below 2 ng/ml. Pregnant mares that did not show oestrus had higher levels of plasma progesterone than pregnant mares showing signs of oestrus 3 weeks after mating. Clinical findings in pregnant and nonpregnant mares 3 weeks after mating is compared, and oestrus in pregnant mares is discussed.

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