Evaluation of factors influencing reproductive performances after estrus synchronization and artificial insemination of cattle in Cameroon
DOI:
https://doi.org/10.19182/remvt.37285Keywords
Cattle, oestrus synchronization, animal reproduction, reproductive performance, CameroonAbstract
Aim: The study was carried out in the Adamawa region (Vina division) in Cameroon, to evaluate the potential factors affecting the fertility and the fecundity of bovine after estrus synchronization and artificial insemination (AI) from April 2019 to June 2022. Results: It shows that 943 females (181 heifers and 762 cows) were inseminated during this period with an average apparent fertility index of 2.3 for overall percentages of pregnancy, abortion, and twinning of 49.5%; 8.3%; and 6.7%, respectively. Days open was 245.2. These reproduction parameters varied significantly according to the breed of the inseminated cow and the type of heat synchronization protocol (p=0.0005). Pregnancy percentages were higher in Holstein and Montbeliard Bos taurus (60.8%) and F1 crossbreeds Bos indicus × Bos taurus (57.6%) compared to the Bos indicus of breed Gudali (41.1%; p=0.0005), respectively. Three therapeutic groups were used for estrus synchronization: the first associate GnRH and prostaglandin F2α (CoSynch), double injection of PGF2α 11 days apart and single injection of PGF2α (n=140; 14.8%); the second on CoSynch + progesterone protocol (433; 46%) and the last group associate progesterone + eCG (370; 39.2 %). Stalled cows, less than 4 years old, with a BCS > 3 and a waiting period from 120 days to one year obtained a better fertility (p < 0.05). The season, the semen of the bull used and the type of female (heifers or cows) would have no influence on the occurrence of pregnancy and calving (p > 0.05) unlike the AI-technician (p < 0.05).
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© J.Kouamo et al., hosted by CIRAD 2023
This work is licensed under a Creative Commons Attribution 4.0 International License.