In contrast, however, introgression of FecB into intensively managed commercial dairy flocks of Awassi and Assaf (an
Awassi×East Friesian composite) ewes in Israel with baseline litter size of approximately 1.3 and 1.65, respectively, increased litter size to acceptable levels of 1.90 and 2.40,respectively, in heterozygotes and 1.92 and 2.55, respectively,
in homozygotes