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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 ...
Factors affecting expression of estrus measured by activity monitors and conception risk of lactating dairy cows
(Elsevier B.V., 2015-10-01)
The objective of this study was to determine risk-factors affecting increase in physical activity during estrus and pregnancy per artificial insemination (P/AI) in lactating dairy cows. Cows were monitored continuously by ...
Expression of estrus modifies the gene expression profile in reproductive tissues on Day 19 of gestation in beef cows
(Elsevier B. V., 2015-10-14)
The aim of this study was to test the effect of expression of estrus at artificial insemination (AI) on endometrium, conceptus, and CL gene expression of beef cows. Thirty-six multiparous nonlactating Nelore cows were ...
Impacts of estrus expression and intensity during a timed-ai protocol on variables associated with fertility and pregnancy success in bos indicus-influenced beef cows1
(2018-01-01)
This experiment evaluated the impacts of estrus expression and intensity, estimated by physical activity during a timed-AI protocol, on reproductive performance of Bos indicus-influenced beef cows. A total of 290 lactating, ...
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, ...
Effect of the Estrus Expression on Follicular and Luteal Morphofunctional Characteristics and Fertility in Bos indicus females Synchronized for FTAI
(Universidade Federal do Rio Grande do Sul, 2021)
Linking activity-sensor data and physiology to improve dairy cow fertility
(Elsevier B.V., 2021-01-01)
Several studies have demonstrated that the intensity of estrous expression is associated with ovulation, ovarian and uterine function, and fertility, and is dependent on social hierarchy and the housing system used. Data ...
Impacts of estrus expression and intensity during a fixed-time AI protocol on parameters associated with fertility and pregnancy success in beef cows.
(Amer Soc Animal Science, 2017-08-01)
Expression of receptors for ovarian steroids and prostaglandin E2 in the endometrium and myometrium of mares during estrus, diestrus and early pregnancy
(Elsevier B.V., 2014-12-30)
The objective of this study was to compare expression of estrogen receptor alpha (ER-alpha), beta (ER-beta), progesterone receptor (PR), as well as prostaglandin E2 type 2 (EP2) and 4 (EP4) receptors in the equine myometrium ...