Regina Daniels-Jacoff was on her way to give birth at South Nassau Communities Hospital when morning traffic slowed her down -- but not her soon-to-be-born son.

She told her father-in-law, Edward Jacoff of Massapequa Park, driving on Sunrise Highway on his way to the hospital, to call for help. "Ready or not, here we go," she remembered thinking.

" 'You have to call 911 -- he's coming now,' " she said she told him.

They pulled over, and about two minutes later, she said, the cavalry arrived -- Matthew Field and John Episcopo, Nassau County Police ambulance medical technicians, who responded to the 9:41 a.m. call.

The two "were really speedy and efficient," she said, not unlike her new son who "slipped" right into one of their hands once she had been moved by stretcher into the ambulance.

When it comes to being an early bird, Aaron Franklyn Jacoff is taking after his older sister, his mom said.

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Back in 2007, her daughter, Camille, arrived just eight minutes after Daniels-Jacoff, of Farmingdale, arrived at the same hospital, she said. Her son was "as fast as the first one," she said.

Both she and her husband, Andrew, are New York City correction officers, and when he got word Monday that she was in labor, he headed to the hospital from his job in Queens, she said.

Upon arriving at the hospital Monday, she and Aaron were "expedited through the emergency department, and a million people came from everywhere," Daniels-Jacoff said.

The rest of the day was far more low-key for Aaron, who weighed 6 pounds, 3 ounces and arrived 10 days before his due date. He was "up and alert mostly all day," getting fed and having a bath, his mother said late Monday afternoon. "He seems to be very happy and easygoing," she said, "and I hope he stays that way."

His older sister was also ahead of the crowd when it came to potty training, walking and talking, Daniels-Jacoff said. If Aaron follows suit, "he'll do everything quickly."