This study was carried out to obtain crossbred F, ewes having prolific birth characteristic and being appropriate dam line for commercial crossbreeding. For the fertility traits of the 80 F1 (Sakız x Kıvırcık) ewes the birth rate was 87.50%, prolific birth rate was 62.86% and litter size was 1.84. For the Kıvırcık ewes, the number of ewes exposed was 62 and the birth rate, prolific birth rate and litter size were 91.94%, 24.56% and 1.25, respectively. The survival rate at 75th day of age for 129 crossbred slaughter lambs was 75.97% and for 71 Kıvırcık lambs was 92.96%.