Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

Dairy Science

Kansas State University Libraries

Kansas Agricultural Experiment Station Research Reports

2017

Presynchronization

Articles 1 - 1 of 1

Full-Text Articles in Life Sciences

Dose And Frequency Of Pgf2Α Administration To Lactating Dairy Cows Exposed To Presynchronization And Either Five- Or Seven-Day Ovsynch Protocols: Ovulation, Luteolysis, And Pregnancy Rates, J. S. Stevenson, J. A. Sauls Jan 2017

Dose And Frequency Of Pgf2Α Administration To Lactating Dairy Cows Exposed To Presynchronization And Either Five- Or Seven-Day Ovsynch Protocols: Ovulation, Luteolysis, And Pregnancy Rates, J. S. Stevenson, J. A. Sauls

Kansas Agricultural Experiment Station Research Reports

Lactating Holstein cows in one herd were milked three times daily and enrolled in a 2 × 2 × 2 factorial design with eight treatments before first postpartum artificial insemination (AI). These treatments were employed to test ovulatory, progesterone, and luteolytic outcomes to three main effects: (1) two GnRH-PGFpresynchronization programs (PG-3-G vs. Double Ovsynch); (2) 5- vs. 7-day Ovsynch-duration programs; and (3) two doses (25 mg on consecutive days) or one dose (50 mg) of PGFadministered before timed AI. Results from this experiment demonstrate no differences in the presynchronization treatments of PG-3-G vs. Double Ovsynch; both …