1988 Cilt 7 Sayı 1-2-3

Permanent URI for this collectionhttps://hdl.handle.net/11452/31984

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    Syncronization of estrus in the sheep
    (Uludağ Üniversitesi, 1988) Ünal, E. Fatih; Uludağ Üniversitesi/Veteriner Fakültesi.
    In the production of domestic animals the control of the date of parturition would be an advance in the husbandry of these animals. For example, careful control of estrus would mean uniformity of age of the new born. Labor associated with breeding or care of the new born could be better programmed and capital could be used more efficiently. Likewise, if estrus can be controlled, one could delay estrus in the female during travel or during livestock shows. Another very important field for synchronization of ewe is in embryo transfer. Manipulation of ovarian function has depended on the following approaches: 1- Blockage of gonadotrophin output (progestin) and then release following by follicle genesis at a designated time. 2-Induction of luteolysis at a designated time (PGF2 α or infusion of uterine irritants) followed by follicle genesis. The basic mechanism by which the ovary is discouraged from growing follicles under natural conditions is by a blockade of FSH output by progesterone and possibly estrogen from the corpus luteum of the cycle, the corpus luteum of pregnancy, or possibly the placenta.