Tuscaloosa, Alabama, family has 2 sets of identical twins in 13 months

Britney and Frankie Alba of Tuscaloosa County, Alabama, defied the odds when they had two sets of identical twins in the span of just 13 months.

Britney Alba, 27, a fourth-grade teacher, and Frankie Alba, 25, a firefighter, have quite a full house with the addition of two boys and two girls. Both sets of twins were conceived naturally and without fertility drugs, the family said.