There is no significant between-farm variability in the effect of Day 7 progesterone on the probability of embryo presence on Day 7 in yr 1 (P = 0.2; Supplemental Figure S8; https:// doi .org/ 10 .3168/ jds .2017 -14306) and yr 2 (P = 0.9; Supplemental Figure S9; https:// doi .org/ 10 .3168/ jds .2017 -14306).