Journal
CIENCIA RURAL
Volume 53, Issue 2, Pages -Publisher
UNIV FEDERAL SANTA MARIA
DOI: 10.1590/0103-8478er20210629
Keywords
embryo transfer; fecundation; reproduction; cow; superovulation
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This study aimed to investigate the effect of single PGF administration concurrent with artificial insemination (AI) on fertilization and embryo production rates in superovulated cows. The results showed that the treatment did not affect embryo production in superovulated cows.
Treatment with prostaglandin F2 alpha(PGF) induces ovulation and increases conception rates in cows, while improving embryo production in buffalos. However, its effect on superovulated cows is unknown. This study verified whether single PGF administration concurrent with artificial insemination (AI) improves fertilization and embryo production rates in superovulated cows. In each replicate, embryo donor cows were equally allocated to two groups: the untreated control and PGF groups. The latter of which received 482 mu g of cloprostenol concurrent with the first AI. Each cow (n = 35) was subjected to two superovulations (SOV) in a crossover design (total = 70 embryo collections). In the control and PGF groups, respectively, the observed responses were [median (95% CI)]: 12 (10-18) and 15 (12-18) total structures, 9 (7-11) and 7 (6-10) viable embryos, 1 (0-1) and 1 (1-3) degenerated embryos, and 1 (0-3) and 2 (0-5) oocytes (P > 0.05). In conclusion, single PGF treatment concurrent with the first AI did not affect embryo production in superovulated cows.
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