Embryo Length on Day 15. Embryo length on Day 15 was recorded for 155 cows in yr 1, with 26 lengths recorded as a minimum length due to the embryo being observed in pieces (a total of 155 embryos in yr 1). In yr 2 embryo length on Day 15 was recorded for 110 cows, with 10 lengths recorded as a minimum length due to the embryo being observed in pieces (a total of 110 embryos in yr 2). Embryo length in cows with lengths recorded as a minimum length due to the embryo being observed in pieces is 50.7 ± 8.1 mm in yr 1 and 46.3 ± 12.7 mm in yr 2 and are not significantly different than the length of fully intact embryos (54.0 ± 4.2 mm in yr 1 and 53.5 ± 4.8 mm in yr 2). Therefore, no evidence suggests that our method of summing the lengths of individual fragments to provide an estimate of embryo length in the case of several TE fragments is biased (based on this small sample size).