Use of Bayesian Inference to Correlate In Vitro Embryo Production and In Vivo Fertility in Zebu Bulls

Table 2

Comparison between conception rate after fixed-time artificial insemination (FTAI) and estimated fertility for each bull, established using the program Winbugs 1.4 with 95% of credibility interval, based on data from cleavage, blastocyst formation rates, and on the combined data.

Bulls	Conception rate after FTAI (%)	Estimated conception rate (%±SD) and Credibility interval (%)
		Cleavage**	Blastocyst formation***	Combined data*
V	54.4	59.8 ± 2.5 (54.9–64.5)	58.5 ± 2.2 (54.1–62.7)	54.7 ± 3.9 (47.1–62.3)
T	54.1	54.2 ± 4.7 (44.8–63.6)	52.3 ± 4.5 (43.6–61.2)	54.2 ± 4.8 (44.8–63.5)
G	63.3	59.8 ± 2.5 (54.9–64.6)	61.5 ± 2.8 (55.9–66.9)	63.0 ± 3.1 (56.9–68.9)

*Model 1 is based on combined data cleavage and blastocyst formation.
**Model 2 is based on cleavage data only.
***Model 3 is based on blastocyst formation data only (Appendix (C)). The conception rate was calculated based on the number of pregnant cows in relation to the total number of inseminated cows. Values in the same column are not significantly different (𝑃>.05).