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- Title
Timed artificial insemination protocols in dairy cattle: Functioning, shortcomings, and improvements.
- Authors
BOUDAOUD, AMINE
- Abstract
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 leading to low circulating oestradiol concentration near oestrus. The standard OvSynch has overcome this problem by enabling fixed-time artificial insemination, for it synchronises follicular wave emergence, luteolysis, and ovulation. However, it did not improve fertility compared to cycles with spontaneous ovulation, which motivated the development of “fertility programs”. These later are nothing but improved OvSynch protocol. This article explains what went wrong with the original OvSynch protocol, discusses the improvements made by “fertility programs”, and highlights the advantages and limits of the newly tested molecules.
- Subjects
ARTIFICIAL insemination; DAIRY cattle; METABOLIC clearance rate; ANIMAL herds; OVULATION; ESTRUS
- Publication
Czech Journal of Animal Science, 2023, Vol 68, Issue 6, p231
- ISSN
1212-1819
- Publication type
Academic Journal
- DOI
10.17221/208/2022-CJAS