Pregnancy rates
Results for pregnancy rates as determined at 32 to 35
and 60 days of gestation are shown in Table 1. More cows
were planned to be in the AI control group than in the other
treatments because costs for this treatment were lower.
Pregnancy rates were lower for TET than for TAI at both
Days 32 to 35 and Day 60 of gestation. There were no
differences in pregnancy rate between cows receiving an
embryo produced with X-sorted and cows receiving an
embryo produced with nonsorted sperm. For TAI, pregnancy
rates at Days 32 to 35 and 60 were not different
(P > 0.1) between cows inseminated with X-sorted sperm
and cows inseminated with nonsorted semen. There was,
however, a nonsignificant trend for pregnancy rate at Day
60 to be lower for cows inseminated with X-sorted sperm.