A 25-year-old woman from Florida gave birth on a W train in Midtown Manhattan on Wednesday morning. She had been missing since last summer, her sister said.

Births are rare on New York City's transit system, but not unheard of. In 2012, Wanda Dueno, 24, went into labor on the J train near Chambers Street and gave birth to a baby boy. And in January 1993, 21 year old Vida Boateng gave birth to a baby girl at the Wall Street subway station on the 3 line.