A pregnant woman was crushed by this bus in The Bronx yesterday – but a superhuman effort by 30 strangers who lifted the vehicle off her body miraculously saved her baby before she died.

Donnette Sanz, 33, identified as an NYPD traffic agent, never got a chance to hold her 3-pound, 6-ounce son, who came into the world via emergency Cesarean section at nearby St. Barnabas Hospital.

She was pronounced dead shortly after his extraordinary birth. The child, named Sean Michael by Sanz’ sister, was in critical condition, but healthy and expected to live.

Within seconds, more than two dozen strangers – from a nearby park, the busy sidewalk and a construction site – had poured into the street to aid Sanz.

“Twenty of us started lifting up the bus – about 10 more came to help,” said hardhat Madalina Diaz, 42, of Ardsley. “We didn’t really communicate, we all just started lifting. We lifted it up and someone pulled her out.

Sanz was rushed into the St. Barnabas emergency room at 2:18 p.m. She survived the emergency delivery, and died at 4:22 p.m., a spokesman said.

The baby boy was named Sean Michael, said Sanz’s sister, Beverly.

Sad – but beautiful – tale.