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.
Ewe body weights. Weights, at lambing and when lamb weaned at 4 months of age, were available for 144 ewes, together with the birth and 4 month weights of their 360 lambs, produced in 316 parturitions.