A woman received quite the morning commuter surprise when she went into labor and gave birth on the New Jersey PATH train this morning.

The baby was born at 9:49 a.m. between the Journal Square Station stop in New Jersey and the 33 rd Street stop in Manhattan, according to ABC station WABC-TV in New York. A fellow passenger, who happened to be an attending physician at St. Luke's-Roosevelt Hospital in Manhattan, assisted in delivering the child on the train, a spokesperson for the hospital told ABCNews.com.

When the PATH train crew learned that Rabita Sarker, 31, of Harrison, N.J., was in labor, the conductors switched the train to express service until 33 rd Street. By the time the train reached 33rd Street, EMS workers and Port Authority police officers were ready and waiting to take the family to the hospital. The newborn baby boy had already been delivered and was being held by his father.

Mother and baby are doing well, the hospital reported.

Dr. Jacques Moritz, director of gynecology at St. Luke's-Roosevelt, said that these types of impromptu deliveries are not as rare as one might think. In fact, one of his patients just gave birth in the Lincoln Tunnel a few weeks ago, he said.

"If you find yourself in this position, don't panic," Moritz said. "If it's happening this way, it means it's going to happen quickly and probably fairly easily. As for people who may try to help, be sure not to pull the baby. The body knows what to do."