Symposium review: Linking activity-sensor data and physiology to improve dairy cow fertility
نویسندگان
چکیده
Several studies have demonstrated that the intensity of estrous expression is associated with ovulation, ovarian and uterine function, fertility, dependent on social hierarchy housing system used. Data from recent involving spontaneous induced estrus shown a greater relative increase longer (captured by different automated activity monitors; AAM) are both improved pregnancy per artificial insemination (AI; around 10 to 14% increase) decreased losses. Intensity duration were surprisingly weakly preovulatory follicle diameter concentrations plasma estradiol at estrus, whereas ovulation failure was low intensity. Studies also display behavior near AI modification genes related immune system, adhesion molecules, prostaglandin synthesis in endometrium. Transcripts leukocytes conceptus tissue maternal recognition as well elongation all differences expression. Most recently, United States Canada reproductive programs emphasizing detection using AAM can be successful comparable intensive timed protocol-based incorporate GnRH PGF2α treatments. Further, one study concluded administration for events greatly AI, but only cows reduced expression, showing potential use data tool targeted programs. Quantitative information could used improve develop decision-making strategies farm level. Future this field should aim better understand ovarian, conceptus, endometrial mechanisms either or refine identification phenotypes (relative increase, absolute baseline levels, duration, repeatability within cow) usage, detection, possibly genetic selection.
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 2021
ISSN: ['0022-0302', '1525-3198', '1529-9066']
DOI: https://doi.org/10.3168/jds.2019-17893