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.
Calculating ahead 140 days from the date you turn the ram with the ewes gives you a date to be ready. Individual breeding dates for each ewe are great but your target date should be just before the first ewe can lamb. Preparation for lambing should include the sheep, the facilities and the shepherd.