Equine chorionic gonadotropin (eCG) treatment in heifers:Double ovulation, twinning rate, and pregnancy losses in twin pregnancies.
ABSTRACT.- This study aimed to evaluate the effects of different doses of equine chorionic gonadotropin (eCG; 200 and 300 IU) administered at the end of a fixed-time artificial insemination (FTAI) treatment protocol on ovulation, pregnancy, and twin rates in Bos taurus beef heifers. In addition, pregnancy losses in heifers with singleton and twin pregnancies were determined.