Jackie Chan was in womb for 12 months ??

Jackie Chan was in womb for 12 months ?? I just happened to read this and couldn't believe it, but seems to be true !!!!
He is quoted as saying:- "Most babies are born in 9 months. I, on the other hand, stuck around an extra 3 months, until my mother was forced to go to a surgeon to bring me into the world, kicking & screaming, by Cesarean section"!! This is taken from his Biography, I am Jackie Chan - My Life in Action. You forget all the things, you just do it!
The pic here is that of Jackie Chan and his parents.