The musculoskeletal system (see Introduction to the Biology of the Musculoskeletal System) includes the bones, muscles, ligaments, tendons, and joints, which support and move the body.
Lambing. Ewes generally lamb around 145 days after mating. Some of course will be earlier & some later, but 145 days is the norm. For a successful lambing, ewes need to receive good nutrition, particularly in the last month of pregnancy when the lamb will approximately double in size.
What signs to look for. Since the normal gestation period of sheep is around 140-145 days, look for these signs around day 135 or so. These signs usually mean that delivery will be during the next 2-15 hours. The ewe will feel most comfortable if not disturbed and the birth may proceed more smoothly.1  separation from other ewes.ince the normal gestation period of sheep is around 140-145 days, look for these signs around day 135 or so. These signs usually mean that delivery will be during the next 2-15 hours.