Analysis of B-ultrasound Luteal Variation Related Indicators of Delayed Ovulation Dairy Cows after Estrus at Different Stages
LIU Xian-xia, WANG Han-kui, WANG Shu-jie, WANG Hai-bin, GU Xin-li
. 2016, (4): 991 -998 .  DOI: 10.16431/j.cnki.1671-7236.2016.04.021