Sexed sperm can contribute to increase the profitability of the cow industry through the production of offspring of the craved sex, such as males for meat or females for dairy production. Therefore, the utilization of sexed sperms plays a very important role in the production of offspring of superior cattle. In this study, we examined the pregnancy rates and calves sexing proportion of male and female calves produced using AI, both performed using sexed and conventional sperm. In the result, the conception rates after ET were 73.3% (33/45) sexed semen and 52% (55/104) conventional semen. Thus, the sex ratio for sexed-semen inseminations was 70% (21/30) females for singleton births within a 272 to 292 day gestation interval. The sex ratio for conventional semen was 61% (34/56) females for births. As a result, it is suggested that the use of sex classification sperm will play a very important role in the offspring production of Korean bovine.

ABSTRACT
INTRODUCTION
MATERIALS AND METHODS
RESULTS AND DISCUSSION
CONFLICTS OF INTEREST
ORCID
REFERENCES

• Enkhbolor Barsuren(Major in the Animal Biotechnology, The Graduate School of Biology & Information Technology, Hankyong National University, Anseong 17579, Korea)
• Sang Hwan Kim(Institute of Genetic Engineering, Hankyong National University, Anseong 17579, Korea)
• Ho-Jun Lee(Institute of Genetic Engineering, Hankyong National University, Anseong 17579, Korea)
• Jong Taek Yoon(Institute of Genetic Engineering, Hankyong National University, Anseong 17579, Korea, Department of Animal Life Science, Hankyong National University, Anseong 17579, Korea) Corresponding author