Not by much, just a few months longer, but enough to look for a reason. In Austria, babies born October-December live about 0.6 year longer than those who first see the world April-June. The same effect emerges in Denmark, but the fall advantage is only 0.3 year. Don't bother looking for an astrological explanation. The longevity enhancement may just be the consequence of more fruits and vegetables being available to pregnant women in the months preceding birth.
(Anonymous; "Study: Babies Born in Fall Live Longer," Scranton Tribune, February 27, 2001. Cr. M. Piechota.)