The Obstetrics Emergency Department is the first of its kind in Massachusetts.

South Shore Health is the only organization in southeastern Massachusetts recognized to perform the specialized ultrasound.

When she felt the first contractions at 11:15 p.m. New Year’s Eve, Renai Townsend thought she had time to get to Boston to deliver her second child. “I thought they were Braxton Hicks contractions, which I had before,” she said. Renai called her parents to come over to watch her 2-year-old son, Will...