The Effect of the Melatoninhormone on the Performance of the Ovaries in Naimi Sheep when Exposed to Different Periods of Light

The study of the hormone melatonin and hormone progesterone in the serum of the blood of Naimi ewes sheep is carried sheep by exposing groups of ewes to different periods of industrial light between May and the end of August just before the beginning of the normal breeding season. The results showed that melatonin concentration when the group exposed to short photoperiods (8L 16D), was the highest and reached (60.55