Some experimental results on fixed time artificial insemination
نویسندگان
چکیده
منابع مشابه
Fixed-time artificial insemination in beef cattle
BACKGROUND The study was designed to test the effect of fixed-time artificial insemination (fixed-AI) after the slightly modified Ovsynch protocol on the pregnancy rate in beef cattle in Finnish field conditions. The modification was aimed to optimize the number of offsprings per AI dose. METHODS Ninety Charolais cows and heifers were entered into the program an average of 1.8 times. Thus, 16...
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It has been repeatedly demonstrated that estrous expression before fixed-time AI (TAI) results in increased pregnancy success. Therefore, the objective of this experiment was to determine if preblastocyst embryonic developmental characteristics differed from heifers that did or did not exhibit estrus before TAI. Beef heifers (n = 113) were synchronized using the 5-d CO-Synch + controlled intern...
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The development of Hard Real-Time systems presents several difficulties to the developers, as they must synchronize carefully the execution of the tasks in the system to produce predictable responses. In this work we present the results of a project devoted to test theoretical results that can simplify the development of real-time software. We have made many changes to the MINIX operating syste...
متن کاملSynchronization of ovulation and fixed-time artificial insemination in beef cattle.
The main objective of the implementation of artificial insemination (AI) in cattle is to produce a sustained genetic progress in the herd. Although AI is an old reproductive biotechnology, its widespread implementation is very recent and is mainly because of the use of protocols that allows AI without oestrus detection, commonly called fixed-time artificial insemination (FTAI). The development ...
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...
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ژورنال
عنوان ژورنال: Mongolian Journal of Agricultural Sciences
سال: 2019
ISSN: 2524-0722,2310-6212
DOI: 10.5564/mjas.v28i03.1298