Effects of use of conventional and sexed semen on conception rate, calf sex, calf birth weight, and stillbirth in Holstein heifers

Pregnancy rate is low in artificial insemination with sexed semen compared to conventional semen. This situation poses a major problem for dairy farms. The aim of this study was determine the effects type on conception rate, calf sex and birth weight, stillbirth, pregnancy loss, postpartum maternal body weight (MBW) Holstein heifers inseminated (n = 229), 153). female male ratios were found be 88% 54.8% 12% 45.2%, respectively. There significant difference between sperm (p < 0.001). While 36.7% calves 34 36 kg weights born from semen, 15.7% Moreover, 46% 17.3% that had 36.1-38.1 > 38.2 while 40% 44.3% A statistically relationship After calving, there MBW after calving In groups, range 11.3% 23.5% 400-460 kg, 46.7% 57.4% 461-511 42% 19.1% 512-587 categories, no 0.05) mean gestation length stillbirth weaning mortality rates. strong positive correlation type, sex, weight. Furthermore, MBW, period survival status calves. It determined minor season period, Our results demonstrated careful consistent application herd management program cattle farms, rates obtained will increase, whilst parameters such as loss decrease.