Minutes before the crash, they were strangers inhabiting vastly different Brooklyns.

Raizy and Nathan Glauber, a recently married couple filled with the worry of first-time parents-to-be, climbed into a livery cab and headed to the hospital to check on her pregnancy.

Julio Acevedo, 44, who struggled with alcohol and a history of serious criminal activity, took the wheel of a borrowed BMW, the police said.

In the early Sunday morning darkness, the BMW slammed into the side of the livery car, causing injuries that claimed the lives of the Glaubers, who were both 21. The magnitude of the tragedy grew even larger on Monday, when the couple’s newborn son, delivered prematurely in an emergency procedure, succumbed to the trauma.

The baby’s death strengthened calls in the couple’s tight-knit Orthodox Jewish community in Williamsburg to bring serious criminal charges against the driver. He had served time in prison for a 1987 killing and was charged last month with drunken driving.