Results 11 to 20 of about 1,561,107 (243)
Timed artificial insemination protocols in dairy cattle: Functioning, shortcomings, and improvements
Czech Journal of Animal Science, 2023 Oestrus detection is currently at the top of the factors limiting the success of artificial insemination in dairy herds. This limitation becomes more pronounced as milk production increases because of higher metabolic clearance rates of steroid hormones ...
Amine Boudaoud
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Timed artificial insemination in dairy cattle
, 2020 Intensive genetic selection for milk production without attention to reproductive performance has contributed to an inverse relationship between milk production and reproduction. Therefore, estrus detection and animal identification have become increasingly difficult in dairy herds because of rising herd size and milk production.
Cirit, Ümüt, Özmen, Mehmet Ferit
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Field assessment of a BCS measuring device at timed AI in crossbread dairy cows of Amazonian smallholders [PDF]
Acta Amazonica, 2023 This study aimed to evaluate the efficiency of a body condition score (BCS) assessment device (BCAD) to identify cows with an adequate BCS and, presumably, a higher fertility when subjected to timed artificial insemination (TAI).
Luiz Francisco. M. PFEIFER +3 more
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SYNCHRONIZATION OF ESTRUS AND OVULATION IN DAIRY CATTLE [PDF]
SPERMOVA, 2019 Development of bovine estrus synchronization protocols started in the 1970’s. The aim of these protocols has changed progressively from synchronizing estrus to synchronizing ovulation with main goal of performing insemination without heat detection ...
A. Tibary, C.Patino, M. Ciccarelli
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Journal of Dairy Science, 2023 : The objective of this observational study was to evaluate the association between increased physical activity at first artificial insemination (AI) and subsequent pregnancy per AI (P/AI) in lactating Holstein cows following spontaneous estrus or a ...
C.M. Tippenhauer +3 more
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Indian Journal of Animal Sciences, 2020 Artificial insemination is a popular assisted reproductive technology that ensures transfer of genetic information from animal to animal. This study was meant to evaluate the influence of artificial insemination and natural mating on selected ...
EDSON BRODELI FIGUEROA PACHECO +5 more
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Oral progesterone supplementation for beef cattle after insemination in TAI programs [PDF]
Pesquisa Agropecuária Brasileira, 2018 : The objective of this work was to evaluate the effects of supplementation with melengestrol acetate (MGA), after timed artificial insemination (TAI), on the conception rate of Nellore cows, according to cyclicity during the protocol, estrus expression ...
Marcus Vinícius Galvão Loiola +6 more
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Synchronization of ovulation in crossbred dairy heifers using gonadotrophin-releasing hormone agonist, prostaglandin F2a and human chorionic gonadotrophin or estradiol benzoate [PDF]
Brazilian Journal of Medical and Biological Research, 2000 Girolando (Gir x Holstein) is a very common dairy breed in Brazil because it combines the rusticity of Gir (Bos indicus) with the high milk yield of Holstein (Bos taurus).
C. Castilho +5 more
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Journal of Dairy Science, 2022 : Lactating dairy cows are classified as spontaneous ovulators, in which establishment of pregnancy depends on the accuracy of detection of behavioral estrus for correct timing of artificial insemination (AI).
P.M. Fricke, M.C. Wiltbank
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Acta Scientiarum: Animal Sciences, 2022 This study evaluated the influence of the quantitative traits measured by real-time ultrasound (adjusted longissimus muscle area [AdjLMA], adjusted rump fat thickness [AdjRFT], and adjusted marbling [AdjMAR]) as well as age at first breeding [AFB] and ...
Rones de Paula Junior +2 more
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