ABSTRACT. During a four-year period, mature ewes were either shorn in mid-pregnancy or post-partum to study impacts on lamb live weight and survival. Furthermore, placental measurements were collected post-partum from a subset of single-bearing ewes and yearly fleece weights and wool samples were collected from a subset of single- and twin-bearing ewes. Lambs born to ewes shorn in mid-pregnancy were heavier (p?.05) and displayed greater (p?.05) survival than those born from post-partum shorn ewes regardless of litter size. Shearing treatment had no effect (p?>?.05) on the weight of the placenta, and diameter or the weight of the cotyledons. However, the number of cotyledons was greater (p?.05) in mid-pregnancy than post-partum shorn ewes. Ewes shorn in mid-pregnancy produced lighter (p?.05) fleeces with greater (p?.05) yields. The fleece displayed shorter (p?.05) staple length, stronger staple strength (p?.05), and was less (p?.05) bright with poorer (p?.05) colour than those shorn in post-partum.