Friends and family identified the victim as 26-year-old Jana Collins. They said her death was a tragic loss.
"She was a good person, a real good person. She was one of my best friends, close to me like one of my sisters," said Shawna Johnson. "We're all sisters and she was one of my sisters.
Witnesses said Collins was sitting in the passenger seat of a vehicle when a gray SUV or sedan pulled alongside and a gunman opened fire. The suspect then sped off.
Residents said they heard four to five shots.
"I heard the shots this morning and it literally stunned me," said one neighbor who didn't want to give his name. "As soon as I rushed to the window I saw that there was a gray car with a window that was all broken and I noticed that somebody got shot in there."
As bystanders screamed for help, a man who had been with the victim just moments before jumped back into the car and drove three blocks to the emergency room at Kaiser Permanente Hospital, where she and her 20-week-old fetus were pronounced dead.
The shooting is believed to be gang related.
No arrests have been made. Police said whoever is responsible could be charged with two murders. LAPD officers are looking for witnesses who can help identify the gunman.
"We're reaching out to the public for information. We've conducted a canvas in the area and we're looking for an individual who has information concerning the shooting, the suspects, the vehicles; anything that you can tell us at all," said LAPD Capt. Evangelyn Nathan.
According to friends Collins had gone to Santa Monica High School and had just gotten married a few weeks ago. She leaves behind two young children.
Residents of South Corning Avenue, a neighborhood of mixed apartment complexes and single-family homes, were stunned by the shooting.
"I was really surprised for someone to get shot, especially with a pregnant woman and an unborn child. This is a first for me; I've never seen something like this before," said Sgt. Albert Rivera, U.S. Army Reservist.
Anyone with information in the case was asked to call West L.A. detectives at (310) 444-1520.