Effect of PRID-Delta devices associated with shortened estrus synchronization protocols on estrous response and fertility in dairy cows
نویسندگان
چکیده
منابع مشابه
Estrus Synchronization Protocols for Cows
Estrous synchronization and artificial insemination (AI) are reproductive management tools available to beef producers for over 30 years. Synchronization of the estrous cycle has the potential to shorten the calving season, increase calf uniformity, and enhance the possibilities for utilizing AI. Artificial insemination allows producers the opportunity to infuse superior genetics into their ope...
متن کاملEffects of different five-day progesterone-based synchronization protocols on the estrous response and follicular/luteal dynamics in dairy cows
This study compared the responses shown by lactating dairy cows to four different P4-based protocols for AI at estrus. Cows with no estrous signs 96 h after progesterone intravaginal device (PRID) removal were subjected to fixed-time AI (FTAI), and their data were also included in the study. In Experiment I, follicular/luteal and endometrial dynamics were assessed every 12 h from the beginning ...
متن کاملComparison of two intravaginal progesterone releasing devices (PRID-Delta vs CIDR) in dairy cows: blood progesterone profile and field fertility.
Objectives were to compare circulating progesterone (P4) profile and pregnancies per AI (P/AI) of two commercial intravaginal P4 devices (PRID-Delta(®) vs CIDR(®)). In Experiment 1, ovariectomized dairy cows (PRID-Delta, n=6 vs CIDR, n=6) were sampled throughout 7 days to measure circulating P4. In Experiment 2 (PRID-Delta, n=399 vs CIDR, n=375), cows were assigned to treatments, as follows: D0...
متن کاملeffect of three methods of estrus synchronization :ovsynch, cidr+ovsynch and presynch+ovsynch on the fertility of dairy cows
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متن کاملEstrus Synchronization in Crossbred Dairy Cows under Field Conditions
A study was conducted to assess the effect of estrus synchronization technique on fertility and estrus induction response in crossbred cows under field conditions. Totally 30 infertile cows (anoestrous 13 and repeat breeder 17) were selected and divided randomly into two groups having 15 cows each. Estrus synchronization protocol (Triu-B) was adopted in Group I and Group II cows were kept as co...
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ژورنال
عنوان ژورنال: Annals of Animal Science
سال: 2017
ISSN: 2300-8733
DOI: 10.1515/aoas-2016-0083