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

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

  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
NRRconv (%) 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
NRRss (%) 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
ΔNRR (%) 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
  1. LF low-fertility group, HF high-fertility group, n number of examined bulls, AI artificial insemination, NRRconv 56-day non-return rate for conventional sperm, NRRss 56-day non-return rate for sex-sorted sperm, ΔNRR relative change of NRRss against NRRconv