Impact of Hormonal Administration on Day 11 Post-Mating on Reproductive  Performance and Blood Parameters in Awassi Ewes

Authors

  • Ali Abbas Fehan College of Agricultural, University of Diyala, Iraq
  • Sajeda Mahdi Eidan College of Agricultural Engineering Sciences, University of Baghdad, Iraq
  • Raed Ibrahim Khalil College of Agricultural, University of Diyala, Iraq

DOI:

https://doi.org/10.48165/ijapm.2026.42.1.14

Keywords:

Kisspeptin-10; GnRH; hCG; Metabolites; Reproductive Performance; Embryonic Loss; Awassi ewes.

Abstract

This study aimed to evaluate the effects of a single hormonal injection of  Kisspeptin-10, GnRH, hCG, and progesterone administered on day 11 post mating (PM) on serum progesterone concentration, selected amino acid and fatty  acid profiles, and reproductive performance in Awassi ewes. Fifty Awassi ewes  (3–4 years old; 40–45 kg body weight) were synchronized using intravaginal  sponges containing 20 mg flugestone acetate for 14 days and naturally mated.  Ewes were randomly allocated into five groups: first group/ control (2 mL normal  saline), second group /Kisspeptin-10 (10 µg/kg BW), third group /GnRH (2.5 mL),  fourth group /hCG (0.5 mL), and fifth group/progesterone (0.5 mL), administered  on day 11 PM. Blood samples were collected on days 34, 51, and 68 of gestation.  Results revealed a pronounced increase (P<0.05) in progesterone and cholesterol  in the hormonal treatment group on days 51 and 68 compared to the control  group. Hormonal treatments increased serum amino acid and fatty acid  concentrations (P<0.01) compared with controls. Hormonal treatments improved  twinning rate and liter size compared with controls. In conclusion, hormonal  administration enhances luteal function and may contribute to reduced  embryonic loss and improved reproductive efficiency in Awassi ewes, economic  return for owner, and utilizing available natural resources and participating in  the achievement of the new Sustainable Development Goals.

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Published

2026-03-11

Issue

Vol. 42 No. 1 (2026): Indian Journal of Animal Production and Management (Jan- Mar)

Section

Research Article

How to Cite

Impact of Hormonal Administration on Day 11 Post-Mating on Reproductive  Performance and Blood Parameters in Awassi Ewes. (2026). Indian Journal of Animal Production and Management, 42(1), 112-123. https://doi.org/10.48165/ijapm.2026.42.1.14