RELATIONSHIP BETWEEN SERUM PROGESTERONE AND ESTRADIOL-17β AND EMBRYONIC LOSS IN FRISIAN COWS UNDER EGYPTIAN CONDITION

Authors

  • M A ABU EL-HAMD Animal Production Research Institute, Agricultural Research Center, Egypt
  • A K KADOOM
  • W F M FOUAD
  • S H HASSOUNA

Abstract

Association between circulating progesterone and oestradiol-17β concentrations and embryonic loss in Frisian
cows (n=105) under Egyptian condition was investigated. Total embryonic losses in present study were 26.4%.
On d25, progesterone (P4) concentrations and sonography revealed 79.3% cows were continuing gestation
and 20.7% lost their pregnancies (early embryonic loss, EEL). Furthermore, 7.4% cows with late embryonic
loss (LEL) were detected between d25-42. An increase in P4 levels started from day 4 to 7 in cows diagnosed
pregnant compared to low P4 in cows that lost pregnancy (p<0.05). Cows with LEL had decrease in P4 from d28.
Estradiol (E2) concentrations increased (p<0.05) in cows with EEL starting from d4 to 21 after AI compared to
cows diagnosed pregnant. Starting from d4 to 40 after AI, P4/E2 ratio was higher (p<0.05) in cows diagnosed
pregnant compared to cows exhibiting EEL loss, while cows with LEL had highest P4/E2 ratio till d25 post-AI and
declined from d28 to 40.

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Published

2022-12-26

Issue

Vol. 40 No. 1 (2019): Indian Journal of Animal Reproduction

Section

Research Article

How to Cite

ABU EL-HAMD, M.A., KADOOM, A.K., M FOUAD, W.F., & HASSOUNA, S.H. (2022). RELATIONSHIP BETWEEN SERUM PROGESTERONE AND ESTRADIOL-17β AND EMBRYONIC LOSS IN FRISIAN COWS UNDER EGYPTIAN CONDITION. The Indian Journal of Animal Reproduction, 40(1), 12–15. Retrieved from https://acspublisher.com/journals/index.php/ijar/article/view/3763