Conception rate following artificial insemination with sexed semen in Holstein heifers under artificial cooling during summer compared with winter season.

The objective of this study was to compare the fertility of Holstein heifers under cooling and inseminated with sexed semen during the summer versus winter season. Eighty heifers were divided into two groups: (1) summer group (n = 40), consisted of heifers under visual heat detection and inseminated with sexed semen. These heifers were also provided with artificial cooling under shade area from 1000 to 1800 h.