Evaluation of ovsynch protocols for timed artificial insemination in water buffaloes in Bangladesh

Authors : Md Nazmul HOQUE, Anup Kumar TALUKDER, Masuma AKTER, Mohammed SHAMSUDDIN

Pages : 418-424

Doi:10.3906/vet-1302-35

View : 17 | Download : 13

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A total of 65 water buffaloes insert ignore into journalissuearticles values(groups A, B, and C); at =>60 days postpartum with a body condition score insert ignore into journalissuearticles values(BCS); of =>2.5 were selected to evaluate ovsynch protocols for timed artificial insemination insert ignore into journalissuearticles values(TAI);. The group A buffaloes insert ignore into journalissuearticles values(n = 25); were treated with a simple ovsynch protocol insert ignore into journalissuearticles values(GnRH - Day 7 - PGF2 alpha - Day 2 - GnRH -16 h - TAI);. The group B buffaloes insert ignore into journalissuearticles values(n = 22); received PGF2 alpha treatment 12 days before the initiation of simple ovsynch insert ignore into journalissuearticles values(PGF2 alpha at Day -12 + simple ovsynch; modified ovsynch);. The group C buffaloes insert ignore into journalissuearticles values(n = 18); were treated with a double ovsynch protocol insert ignore into journalissuearticles values(GnRH - Day 7 - PGF2 alpha - Day 3 - GnRH - Day 7 - GnRH - Day 7 - PGF2 alpha - 48 h - GnRH - 16 h - TAI);. Milk P4 ELISA was used for tracking ovulation and conception rates. Ovulation rates were higher in buffaloes that received the double ovsynch treatment insert ignore into journalissuearticles values(group C; 83.3%); than those with simple ovsynch insert ignore into journalissuearticles values(group A; 72.0%; P < 0.05);. The group C cows insert ignore into journalissuearticles values(44.4%); achieved a higher conception rate than the cows of groups A insert ignore into journalissuearticles values(28.0%); and B insert ignore into journalissuearticles values(36.4%); insert ignore into journalissuearticles values(P < 0.05); and multiparous buffaloes having BCS of =>3.5 responded better to the ovsynch treatments than the primiparous ones insert ignore into journalissuearticles values(P < 0.05);. The double ovsynch protocol increases both ovulation and conception rates in comparison to the simple and modified ovsynch protocols and is more effective in multiparous cows than in primiparous ones.
Keywords : Ovsynch, timed artificial insemination, milk ELISA, water buffaloes