Clinical Trials to Improve the First Insemination Conception Rate in Postpartum Holstein Cows with Urovagina
نویسندگان
چکیده
منابع مشابه
Insemination factors affecting the conception rate in seasonal calving Holstein-Friesian cows.
Differences in conception rate to first service between artificial inseminations (AI) carried out by commercial AI operators (CAI) or do-it-yourself operators (DIY), between natural service (NAT) and AI, between different AI sires, and between fresh and frozen-thawed semen, on Irish commercial dairy farms, were studied using logistic regression. The study comprised 12,933 potential first insemi...
متن کاملComparing First Service Conception Rate Before and After Milking in Holstein Cows
The objective of this study was to comparing first service conception rate before and after milking and changes in metabolite and hormones during four times realted to milking in lactating dairy cow. High producing Holstein cows (> 30 Kg/d and BCS) were randomlly selected and assigned into two groups: 1- insemination before morning milking (0700 a.m, n = 150) and 2- insemination after morni...
متن کاملComparative cervical cytology and conception rate in postpartum dairy cows
During the early postpartum period, multiple bacterial species invade the uterus of cows. Phagocytosis by polymorphonuclear cells is a primary mechanism involved in the elimination of bacteria and improvement of conception rate. Therefore, a relationship could exist between endometrial cytology and conception rate of postpartum dairy cows. In this study 50 postpartum healthy Holstein Frisian da...
متن کاملSetting up Cows for First Postpartum Artificial Insemination
A long standing goal of reproductive physiologists was to develop a hormonal synchronization program that could overcome the problems and limitations associated with visual detection of estrus in dairy cattle. This goal was realized in 1995 with the publication of a hormonal synchronization protocol that combined GnRH and PGF2α to control ovarian physiology and is now commonly referred to as th...
متن کاملEstimation of Genetic and Phonotypic Trends for Age at First Calving, Calving Interval, Days Open and Number of Insemination to Conception for Isfahan Holstein Cows
For the current research the records of 62 farms in Isfahan province were available. To estimate genetic and phonotypic trends of reproductive traits such as age at first calving, calving interval, days open and number of insemination to conception rate the records of 63,866 cows including 167793 reproductive records were employed. Farms were covered by Vahdat industrial Agriculturists and Dair...
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ژورنال
عنوان ژورنال: Suez Canal Veterinary Medicine Journal. SCVMJ
سال: 2015
ISSN: 2682-3284
DOI: 10.21608/scvmj.2015.65064