The incident happened around 9 p.m. at West 165th Street and Broadway in Washington Heights.
The victim was shot one time in the leg while sitting inside a grey Honda.
Witnesses told Eyewitness News reporter Lucy Yang that the victim's mother and a neighbor came running to the wounded teenager and that an ambulance arrived quickly, as did police.
Multiple eyewitnesses said they heard the mother informing the paramedics that her 18-year-old daughter is pregnant.
"There was a pregnant lady on the corner. I don't know if she was innocent bystander but she was shot in the leg," witness Ozzy Orengo said. "Her mother came running and so did a neighbor. Helped her into ambulance."
She was taken to Harlem Hospital, where she's expected to make a full recovery.
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The suspects, described as five men, fled westbound on 165th Street.
No arrests have been made and the investigation is ongoing.
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