Kismet hatched in October 2002 and laid her first clutch of four eggs in July 2006, so she was three and a half. I had read that four was the youngest it would happen back then so it caught us off guard. She laid them outside on the concrete and looked like death. I rushed her to the vet and he x-rayed her and everything was fine. She laid again in 2008, two years to the day. She has had eggs since but reabsorbed them. This year she became gravid unusually early and I am guessing it is the presence of a male.