The growth rate of the LF from the time of implant
removal until FTAI (mm/day) was defined as the difference
between the diameter of the LF on Days 10 and 8, divided
by the number of days (two). Ovulation was considered
as the appearance of a CL on the same ovary where the
LF was detected on Day 10. Pregnancy diagnosis was performed
by ultrasonography 30 days after FTAI. Pregnancy
per AI (P/AI) was defined as the number of pregnant heifers
divided by the total number of heifers submitted to FTAI in
each treatment (eCG or no eCG).