Controlling the dominant follicle in beef cattle to improve estrous synchronization and early embryonic development
نویسندگان
چکیده
منابع مشابه
Product Development for Estrous Synchronization : Beef Cattle
Physiological principals underlying synchronization of estrus identified 1) hormones naturally controlling the estrous cycle of cattle, 2) hormones commercially available, 3) mode of action of the hormones commercially available, and 4) when/how they might be used to manage estrus and breeding of beef cattle. The products available are progestogens (melengestrol acetate (MGA) and progesterone d...
متن کاملSynchronizing Estrous in Beef Cattle
Synchronization of estrus contributes to optimizing the use of time, labor, and financial resources by shortening the calving season, in addition to increasing the uniformity of the calf crop. The major limitation of estrus-synchronization programs is their inability to induce a potentially fertile estrus and ovulation in noncycling cattle (i.e., prepubertal heifers and anestrous suckling cattl...
متن کاملApplication of the CIDR-B to Estrous Synchronization in Beef Cattle
Progesterone, or progesterone like compounds, (progestins) have been investigated and used for estrous synchronization for several decades. However, the success rates of programs that use progestins have varied considerably. A primary challenge to the use of this hormone for synchronization was the repeated observation in the past of reduced fertility at the synchronized estrus. Perhaps of even...
متن کاملFactors affecting pregnancy rate to estrous synchronization and fixed-time artificial insemination in beef cattle.
Application of AI in extensive beef cattle production would be facilitated by protocols that effectively synchronize ovarian follicular development and ovulation to enable fixed-time AI (TAI). The objectives were to determine whether use of a controlled internal drug release (CIDR) device to administer progesterone in a GnRH-based estrous synchronization protocol would optimize blood progestero...
متن کاملEstrous synchronization and artificial insemination have potential to increase the rate of genetic improvement, calf uniformity and improve calf weaning weight in beef cattle
Estrous synchronization and artificial insemination have potential to increase the rate of genetic improvement, calf uniformity and improve calf weaning weight in beef cattle operations. Synchronization programs utilizing exogenous progestins, gonadotropin releasing hormone (GnRH), and prostaglandin (PGF 2 α) have been shown to be effective for estrous synchronization in beef cows and heifers (...
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ژورنال
عنوان ژورنال: Bioscientifica Proceedings
سال: 2019
ISSN: 2515-0227
DOI: 10.1530/biosciprocs.7.029