Effect of season on embryo production in Iraqi local black goat

The aim of this study was to investigate the effect of season on embryo production in Iraqi local black goat. 599 female genital system of Iraqi local black goat were collected from AL-Fallujah abattoir, AL-Anbar province during the period from July 2010 to the 1st July 2011. The oocytes were collected via aspiration and slicing. Only good and fair quality oocytes were selected for in vitro maturation. Fresh semen were used from two Bucks of proven fertility for fertilization . TALP , MEM , and TCM-199 culture media were used of in-vitro maturation (IVM) and in-vitro fertilization (IFV). It has been shown that high recovery and maturation rate 87.3% and 45.6% respectively were observed at breeding season as compared with recovery rate 72.5% and maturation rate 35.2% respectively in non-breeding season. There was a significant difference (P˂0.05) in recovery rate and maturation rate between different season. It has been found that fertilization rate was 60.05% in breeding season. While it has 33.9% in non-breeding season. There was a significant difference in fertilization rate (P˂0.05) between breeding and non-breeding season. Blastocyst obtained during breeding season was 56.41% , while it was 43.24% in non-breeding season. There was a significant difference (P˂0.05) between different season. It was concluded that there is an effect of season on oocyte recovery