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 will vary in the time taken to complete lambing. The last stage of lambing includes the expulsion of the afterbirth or placenta. The placenta is usually expelled 30 to 60 mintues after the delivery of the last lamb. If the placenta is not expelled after 24 hours, there may be a problem.