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.
Ewes reach sexual maturity at about 6 months old but they are not allowed breed until they are about one and a half years old. Most lambs are born in Spring. Ewes usually give birth to either one or two lambs at a time. The ewe carries the lambs for about 5 months before they are born.