Increasing of heat on meat type of sheep using exogen hormon treatments in out of season

This study has been carried out at Research Farm of Cukurova University, Faculty of Agriculture in order to determine the most effective synthetic progesterone product to detect the oestrus rates of sheep. For this purpose 80 randomly selected Cukurova Meat Sheep (Chios x Awassi females mated Ile de France and Rambouillet rams later the flock was isolated) were assigned to four groups (20 sheep in each) and synchronized with MAP, CIDR, FGA and Norgestomet with sponge withdraw. 500 I.U. PMSG has been injected intramuscular.The time between PMSG injection and oestrus in CIDR, MAP, Norgestomet and FGA were 33.70±2.40 h, 37.53±2.29 h, 43.65±2.71 h and 42.97±1.96 h, respectively. There was a significant difference between PMSG injection time and first oestrus behavior (P<0,01). Oestrus rates in MAP, CIDR, FGA and Norgestomet were 100 %, 90 %, 80 % and 65 %, respectively. Also there was significant difference between oestrus rates among different treatments (P<0,05).Fertility, litter size and fecundity in FGA 20 %, 175 % , 35 %; in CIDR 35 %, 143 %, 50 %; in MAP 30 %, 133 %, 40 % and in Norgestomet 10 %, 100 %, 10 %, respectively.Keywords: Meat sheep, synchronization, anoestrus, oestrus, litter size.