Effect of resynchronization programs according to the ovarian status on pregnancy outcomes in dairy cows

This study evaluated the effect of resynchronization programs on pregnancies in dairy cows. Of 1,342 cows confirmed not pregnant after their first artificial insemination (AI), those with a corpus luteum (CL) were resynchronized using Ovsynch or PG-GnRH-Ovsynch and without CL GnRH-Ovsynch modified Double-Ovsynch. There no differences (p > 0.05) per AI either between (31.3%) (34.0%) (38.7%) Double-Ovsynch (39.5%). In conclusion, could be preferred to resynchronize CL, respectively, from perspective reducing costs labor.