Table 2.

Fertility scores of mature Holstein bulls. High fertility (HF) bulls were designed from 1 to 5 and bulls 5 to 10 were grouped as low fertility (LF). Fertility score of each bull was expressed as the percent difference of its conception rate from the average conception rate of all bulls. Probit.F90 software was used to estimate bull fertility

Bull #	Fertility status	Number of breedings	Conception rates difference from average (%)	Std of difference	Conception rates (%)
1	HF	5293	5.42	2.02	45.3
2	HF	825	5.1	1.90	40.4
3	HF	2032	4.8	1.79	40.3
4	HF	2487	3.59	1.34	45.7
5	HF	5751	3.56	1.33	39.8
6	LF	1604	−3.75	−1.40	35.7
7	LF	2276	−4.06	−1.52	37.8
8	LF	967	−4.49	−1.68	34.4
9	LF	5603	−6.76	−2.52	34.6
10	LF	674	−10.61	−3.96	23.3