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Association of concentrations of beta-carotene in plasma on pregnancy per artificial insemination and pregnancy loss in lactating Holstein cows
(Elsevier B.V., 2020-01-15)
The objective of this study was to determine the association of beta-carotene concentration in plasma at the moment of artificial insemination (AI) on pregnancy/AI in lactating Holstein cows. A total of 399 events from 364 ...
Pregnancy loss (28–110 days of pregnancy) in holstein cows: a retrospective study
(2020)
High-yield dairy cow farms have implemented high technified management for the last few decades, aiming at optimizing productions with the best animal welfare canons. A key point to achieve this is the reproductive ...
Pregnancy rate, pregnancy loss, and response to head stress after AI at 2 different times from ovulation in dairy cows.
(Soc Study Reproduction, 1997-01-01)
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 ...
Impact of Probing the Reproductive Tract During Early Pregnancy on Fertility of Beef Cows
(Wiley-Blackwell, 2014-08-01)
This short communication reports the impact of endometrial biopsies, uterine flushings and follicular fluid aspiration procedures at day 6 post artificial insemination (AI) on pregnancy rates. In Experiment 1, cows were ...
Intensity of estrus following an estradiol-progesterone-based ovulation synchronization protocol influences fertility outcomes
(Elsevier B.V., 2019-04-01)
The objective of this study was to examine the association between increased physical activity at the moment of timed artificial insemination (AI), detected by an automated activity monitor (AAM), and fertility outcomes. ...
Use of bovine pregnancy-associated glycoproteins to predict late embryonic mortality in postpartum Nelore beef cows
(2016-06-01)
The primary objective was to determine if circulating concentration of bovine pregnancy-associated glycoproteins (bPAGs) on Day 30 after artificial insemination (AI) may serve as a marker of late embryonic mortality in Bos ...
The effect of follicle age on pregnancy rate in beef cows
(Amer Soc Animal Science, 2014-03-01)
The effect of the age of the ovulatory follicle on fertility in beef cows was investigated. Multiparous (n = 171) and primiparous (n = 129) postpartum beef cows in 2 groups (G1 and G2) received estradiol benzoate (EB; 1 ...
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)
Probability of pregnancy to artificial insemination either after detected oestrus or at a fixed time in dairy cows: Influence of intrinsic and extrinsic factors in a large-scale, on-farm study
(2021-05-01)
The first aim of this study was to determine the influence of the procedures [hormonal treatments for fixed time artificial insemination (FTAI) versus insemination at spontaneous oestrus (SEAI)] on several sequential ...