Mature Weight

Positive figures identify breeding lines that will be bigger at maturity. In certain hill breeds, even though it is advantageous to enhance lamb growth rates, it may be desirable to restrict increases in the mature size of the ewe.

A ram with a litter size EBV of +0.3 is expected to produce ewe lambs that will have,
on average, 0.15 more lambs than ewes from a ram with an EBV of 0.