USA Today reports on a March of Dimes study which shows a decline in the average gestational age of newborns from 40 weeks to 39 weeks. This might lead some to wonder if our species is evolving; but study co-author Nancy Green doesn't think so. More likely we are just intervening early in more cases than ever (C-sections and inductions).
In addition, the percentage of babies born between 34-36 weeks is increasing.
Brave new world?