Progesterone and estradiol 17-β levels at the time of insemination and early pregnancy as a predicitve study for early embryonic loss [electronic reource].

Includes references.

The aim of the present study is to clarify the relationship between progesterone and estradiol 17-β at the time of insemination and at days 7, 21, and 42 postinsemination in three groups of Holstein-Freisian dairy cows. One of them showed succesful conception and the other two groups showed failure of conception (one failed to conceive und returned to estrus 42 days after insemination and the other failed to conceive and returned to estrus 21 days after insemination). The obtained results revealed a significant increase in the mean level of progesterone in pregnant cows compared to non-pregnant ones and cows had earlly embryonic losses. This increase was noticed at days 0, 7,21 and 42 after insemination. While, during these periods the level of estradiol 17-β was significantly higher in cows had early embryonic losses than in pregnant and nonpregnant cows. The present study concluded that, low progesterone and high estradiol 17-β at the time of insemination could be a criteria for early prediction of future embryonic mortality.

Summary in Arabic.

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