Table 4-2. Effect of season and IGF-1 on pregnancy rate at Day 21 (based on elevated plasma progesterone concentrations), Day 30
 (based on ultrasound) and Day 45 of gestation (based on rectal palpation) and calving rate among recipients that received
 embryos that were cultured in 5% 02 and harvested on Day 7.
 Pregnancy rate, number pregnant/total (%)a Calving rate, number calving/total (%)b
 Day 21 Day 30ce Day 45df All calves Live calves
 Cool season
 Control 27/42 = 64.3% 13/40 = 32.5% 11/45 = 24.4% 5/22 = 22.7% 4/21 = 19.1%
 IGF-1 27/39 = 69.2% 13/37 = 35.1% 11/42 = 26.2% 5/22 = 22.7% 5/22 = 22.7%
 Hot season
 Control 41/59 = 69.5% 15/71 = 21.1% 13/71 = 18.3% 5/38 = 13.2% 5/38 = 13.2%
 IGF-1 51/63 = 81.0% 34/69 = 49.3% 28/67 = 41.8% 10/30 = 33.3% 9/29 = 31.0%
a Differences in the number of recipients at each time point is due to some recipients not being diagnosed for pregnancy at all time
points. b Data does not include Farm 3. C Treatment P < 0.05. e Season x treatment P < 0.06. f Season x treatment P < 0.09.