Progesterone and behavioral features when estrous is induced in Alpine goats

Area of Science:

• Reproductive Endocrinology
• Veterinary Science
• Animal Reproduction

Background:

• Estrus synchronization is crucial for efficient goat breeding programs.
• Hormonal protocols are commonly used to manage reproductive cycles in goats.
• Understanding endocrine and behavioral responses is key to optimizing induction protocols.

Purpose of the Study:

• To evaluate the endocrine and behavioral characteristics of estrus induction in Alpine goats.
• To compare the efficacy of a specific hormonal treatment across different physiological states (nulliparous, non-lactating, lactating).
• To assess the impact of hormonal estrus induction on conception rates in Alpine does.

Main Methods:

• Alpine does (nulliparous, non-lactating, lactating) received intravaginal medroxyprogesterone acetate sponges.
• Hormonal treatment included eCG and d-cloprostenol administered before sponge removal.
• Plasma progesterone was monitored, and estrous response, interval, duration, and conception rates were recorded.

Main Results:

• High estrous response rates (85.7-97.2%) were observed across all groups, with no significant differences.
• Estrus interval and duration were similar among nulliparous, non-lactating, and lactating does.
• Conception rates were significantly higher in lactating does (77.8%) compared to non-lactating does (44.4%).

Conclusions:

• Hormonal treatment effectively induces estrus in Alpine goats, irrespective of their reproductive status.
• Acceptable fertility can be achieved through this induction method.
• Lactating does exhibited superior conception rates, suggesting potential benefits for this group.