QP: questionable pregnant. On Day 27, 2.5% (21/831) of cows were diagnosed as questionable pregnant. On Day
55, 76.2% (16/21) of the cows classified as questionable pregnant were determined to be not pregnant, and 23.8%
(5/21) were confirmed pregnant (2 in Group 1, 2 in Group 2, and one in Group 4).