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.
If you use a marking harness on your ram(s) during breeding, or if you have been observant and recorded breeding dates, you can add five months to the date when the ewe was last bred to predict when she will lamb. The exact gestation period varies by breed, from 142-154 days.