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Expression of estrus improves fertility and decreases pregnancy losses in lactating dairy cows that receive artificial insemination or embryo transfer
(2016-03-01)
The objective was to evaluate if expression of estrus by dairy cattle altered fertility in timed artificial insemination (AI; n = 5,430) or timed embryo transfer (ET; n = 2,003) programs that used estradiol and progesterone ...
Comparison of two methods of synchronization of estrus in brown brocket deer (Mazama gouazoubira)
(Elsevier B.V., 2010-02-01)
This study aimed to establish a protocol for synchronization of estrus in brown brocket deer (Mazama gouazoubira). Two groups of hinds (n = 3) were submitted to two different protocols: Treatment 1 received an intravaginal ...
The use of hcg for inducing ovulation in sheep estrus synchronization impairs ovulatory follicle growth and fertility
(Multidisciplinary Digital Publishing Institute, 2021-04)
Currently, there is an intense effort to find an alternative hormone to eCG to induce ovulation after estrus synchronization treatments in sheep. One of the proposed alternatives is based on the use of hCG, but the results ...
Progesterone administration in planned reproduction of cattle
(Nova Science Publishers, 2017)
Cattle are one of the most used species for animal husbandry. The growing demand of products derived from cattle has led to the development of intensive production systems. These systems require a programmed reproduction ...
Effects of season and ovarian status on the outcome of long-term progesterone-based estrus synchronization protocols and ovulatory follicle development in Santa Inês ewes under subtropical conditions
(Elsevier B. V., 2015-09-18)
This study set out to investigate the efficiency of long-term estrus synchronization protocols and ovulatory follicle dynamics in ultrasonographically monitored Santa Inês ewes during lengthening (LD; September-October) ...
Daily lying behavior of lactating Holstein cows during an estrus synchronization protocol and its associations with fertility
(Elsevier B.V., 2017-10-01)
Objectives were to quantify lying behavior (LB) during an estradiol and progesterone-based synchronization protocol, to assess risk factors for ovulation, pregnancy per AI (P/AI), and degree of behavioral change at estrus, ...
Detection of estrous behavior in buffalo heifers by radiotelemetry following PGF2α administration during the early or late luteal phase
(2014-01-30)
This study examined the usefulness of radiotelemetry for estrous detection in buffalo heifers and the impact of prostaglandin F2α (PGF2α) administration during the early or late luteal phase on estrous behavior and ovulatory ...
Correlation between estrus onset and ovarian parameters in dairy goats
(Universidade Federal de Goiás, 2022-05-13)
This study assessed the effects of social dominance on the behavioral estrus and ovarian parameters of dairy goats subjected to synchronous estrus induction during the non-breeding season. Synchronous estrus was induced ...