Superovulation Using CIDR in Holstein Cows.
نویسندگان
چکیده
منابع مشابه
Differences between Brahman and Holstein cows in response to estrus synchronization, superovulation and resistance of embryos to heat shock.
Embryos from Bos indicus are more resistant to elevated culture temperature (i.e. heat shock) than embryos from some Bos taurus breeds. The present experiment was designed to determine if Brahman embryos have greater resistance to heat shock than Holstein embryos at a stage in development before the embryonic genome was fully activated. A second objective was to test breed effects on estrus syn...
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The objective of this study was to determine the effects of superovulation (SOV) on serum and uterine biochemical parameters, uterine bacteriology and cytology and number of transferable embryos (TE). Dairy cows were placed on a Presynch/CIDR Synch protocol. The SOV group was superovulated, induced in estrus, and inseminated, whereas the control group was induced in estrus and inseminated witho...
متن کاملPolymorphisms of the bovine growth differentiation factor 9 gene associated with superovulation performance in Chinese Holstein cows.
Growth differentiation factor 9 (GDF9) belongs to the transforming growth factor β superfamily and plays a critical role in ovarian follicular development and ovulation rate. We examined the bovine GDF9 gene polymorphism and analyzed its association with superovulation performance. Based on the sequence of the bovine GDF9 gene, six pairs of primers were designed to detect single nucleotide...
متن کاملInductions of superovulation using several FSH regimens in Holstein-Friesian heifers.
Note Eighty-three Holstein-Friesian virgin heifers were randomly divided into four groups and superovulated with one of the four FSH regimens as follows : Group I) twice daily injections of a constant dose of 5 mg of FSH for a period of 4 days, giving a total dose of 40 mg in 8 fractions ; Group II) as in Group I with additional 5 mg of FSH on the 5th day, giving a total dose of 45 mg ; Group I...
متن کاملFertility of Holstein Cows in Chengdu, China**
Data on the use of breeding records of dairy cattle farm of Fenghuang-shan in Chengdu areas during a period of six years is systematically analyzed. The results show that Holstein heifers have their 1st estrus at an average age of 513.6±46.7 d which is not related to the calving season. Estrus mostly occurs in the months with mild ambient temperature (March, April, May, November and December). ...
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ژورنال
عنوان ژورنال: Journal of Reproduction and Development
سال: 1994
ISSN: 0916-8818,1348-4400
DOI: 10.1262/jrd.40.259