Abstract The reproductive efficiency of the cows was monitored after two resynchronization protocols: Ovsynch (OVS) and Double (DOS). research initially included 70 HF who entered first synchronization protocol – Presynch. Cows that did not conceive were divided into groups introduced to protocols. In group (n=35), DOS began with application GnRH on day 22 Presynch TAI (Timed Artificial Insemin...

Bull service is the most common insemination method in pastoral herds grazing rangelands. To accelerate multiplication and distribution of access to high quality Sahiwal genetics communities, development agencies have promoted use Assisted Reproductive Technologies (ARTs) Kenyan However, sustainable ARTs uncertain because herd owners attach value bull calves genetic merits for breeding, which a...

This study was carried out at Sakha Animal Production Research Station, during the period from Oct., 2009 to Sept., 2010. Forty Rahmani ewes were divided into three treatment groups: the 1st, 2nd and 3rd treatment groups were intramuscularly injected (Day 0) with 1 mL GnRH analogue followed by an intramuscular injection with 0.7 mL PGF2α5 (G1), 6 (G2) or 7 (G3) days later. A second dose of 1 mL...