The micro-RNA content of unsorted cryopreserved bovine sperm and its relation to the fertility of sperm after sex-sorting

Table 4 Fertility data of 18 bulls in relation to their fertility group

	LF				HF				Total
	n	Mean ± SD	Min	Max	n	Mean ± SD	Min	Max	n	Mean ± SD	Min	Max
First AI with conventional sperm	9	7232 ± 4466	1931	13,656	9	11,549 ± 16,817	613	57,705	18	9391 ± 12,491	613	57,705
First AI with sex-sorted sperm	9	1208 ± 357	741	1836	9	2674 ± 2805	520	9863	18	1941 ± 2130	520	9863
NRR_conv (%)	9	69.57 ± 3.33	64.11	73.85	9	68.61 ± 2.09	64.97	72.58	18	69.09 ± 2.82	64.11	73.85
NRR_ss (%)	9	54.10 ± 4.70	45.58	59.81	9	62.69 ± 2.74	58.13	68.10	18	58.40 ± 5.77	45.58	68.10
Δ_NRR (%)	9	22.33 ± 4.01	31.44	18.84	9	8.63 ± 1.71	10.53	5.25	18	15.48 ± 7.50	31.44	5.25

LF low-fertility group, HF high-fertility group, n number of examined bulls, AI artificial insemination, NRR_conv 56-day non-return rate for conventional sperm, NRR_ss 56-day non-return rate for sex-sorted sperm, Δ_NRR relative change of NRR_ss against NRR_conv

ISSN: 1471-2164