When we were in antepartum, the doctor told us that there are a number of risk factors that determine survival rates and disability rates — the ones I remember were sex, multiples vs. singletons, whether the mother received a steroid, and race. Gabriel was a singleton (good), Miri got the steroid shot (good) but he was a boy (girls do better) and he was Caucasian (blacks do better). They don’t really know why, but black girls have the best survival rates, they said. This article talks about risk factors both for being born early, and risk factors for survival once the premature birth has occurred.