The crew of the USNS Comfort got a chance Thursday to deliver its first baby since its arrival in Port-au-Prince, but the procedure was creating as much anxiety as happiness.

A young woman, 34 weeks pregnant, arrived on the ship with a fractured pelvis that caused her uterus to drop, much as it would when she was ready to give birth. Because of the baby, surgeons can’t operate to fix her pelvis, so they were preparing for a Caesarean-section followed by exploratory surgery and a possible fix to her broken bones.

The Comfort already has plenty of babies onboard, some of them quite sick but many of them brought to the ship simply so their mothers would not have to look for post-natal care in Haiti. One of the first babies onboard was a young man named Vinson, named after the aircraft carrier U.S.S. Carl Vinson, where his mother said he was born.