Understanding Reproduction in Farm Animals and Estrus Cycle
Explore the stages of the estrus cycle in farm animals, including proestrus, estrus, metestrus, and diestrus. Learn about puberty and maturity, hormone regulation, classification of animals based on estrus appearance, and the impact of seasonality on reproduction. Discover the difference between long day breeders like horses and short day breeders like sheep and goats, all essential for successful breeding in farm animals.
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Presentation Transcript
REPRODUCTION IN FARM ANIMALS REPRODUCTION IN FARM ANIMALS
Estrus cycle Include four phases : - Proestrus phase - Estrus phase - Metestrus phase - Diestrus phase
Estrus Metestrus Diestrus proestrus Estrus cycle
Puberty : The ability of animal to produce oocyte in female or sperm in male Maturity: The ability of male to precipitate the semen inside the female genital tract Or the ability of female for pregnancy and parturition
Hypothomes GnRH Pituitary FSH FSH Few Ovary Estrogen
Hypothomes GnRH Pituitary FSH LH Estrogen Ovary
Hypothomes GnRH Pituitary LH Ovary
Hypothomes GnRH Pituitary LH FSH LH Prostaglandin PGF2 Few Ovary Progesterone Progesterone
Hypothomes GnRH Pituitary LH FSH LH Prostaglandin PGF2 Few Ovary Progesterone Progesterone
Hypothomes GnRH Pituitary FSH FSH LH Ovary
The animals classified in to three types according to the appearance of estrus Continuous appearance of estrus cycle (cow) Pregnancy or disease Seasonal poly estrus animals (in limit time which is called season) Horse Sheep and goat Seasonal monoestrus animals (in limit time which is called season) Dog and cat
Seasonality The season : Reproduction in limit time The light play an important role for reproduction Two types of season: Long day breeder ( horse) Short day breeder ( sheep and goat)
Seasonality Long day breeder animals From the end of December Eyes Pineal gland GnRH Melatonin Anestrus
Seasonality Long day breeder animals From the end of December Eyes Pineal gland GnRH Estrus Melatonin
Seasonality Short day breeder animals From the end of June Eyes Pineal gland GnRH Melatonin Anestrus
Seasonality Short day breeder animals From the end of June Eyes Pineal gland Estrus GnRH Melatonin
