Ten of the 21 busiest maternity units in southeastern Pennsylvania in 2011 were in safety-net hospitals.
And three of those top five are members of the Safety-Net Association of Pennsylvania (SNAP):  Pennsylvania Hospital (#2), the Hospital of the University of Pennsylvania (#3), and the Albert Einstein Medical Center (#5).
Other SNAP members in the top 21 are Hahnemann University Hospital (#11) and Thomas Jefferson University Hospital (#12).
SNAP views offering maternity services as one of the core functions of safety-net hospitals.  Most safety-net hospitals offer this service.
To learn more about which hospitals are delivering babies in what numbers in southeastern Pennsylvania, read this Philadelphia Business Journal article.