The Christmas Connection
According to this article, being born on Christmas evidently runs in the family:
A woman born on Christmas Day gave birth on Christmas Day. Aimee Harrison from South Whinfell, Cumbria [county in England] gave birth to 8lb 14oz daughter Abbie-Jane 11 days late. According to the Mirror Aimee said: "It was getting past a joke - she was obviously holding on." Aimee, who has a twin brother, added: "We always had to wait until February for our birthday party. I suppose it'll be the same for Abbie."