Thuy Nguyen Le, of Monterey Park, was the first mother to give birth to a set of twins. Her sons Marcus and Matteo were born at 8:53 and 8:55 a.m.
Twins Marcus and Matteo.
The second set of twins was born to Charlene and Andres Vargas, of Chino. Their twins Ava Marie Vargas and Andres Angel Vargas III were welcomed into the world at 11:58 a.m. and 12 p.m.
Twins Charlene and Andres Vargas.
The third family to welcome a pair of twins was Maricela Mercado and Javier Huerta, from West Covina. Their twins Lorenzo Javier Huerta and Valentina Raquel Huerta were born at 2:31 and 2:33 p.m.
Twins Lorenzo Javier Huerta and Valentina Raquel Huerta.
The last set of twins born at Kaiser Permanente Baldwin Park last Wednesday was to Evelyn Anguiano-Gomez and Alfredo Gomez, of La Puente. Their twins Emberlyn and Isabelle were born at 5:14 and 5:17 p.m.
Twins Evelyn Anguiano-Gomez and Alfredo Gomez.
"I don't think in our 23-year history we've ever had four in 12 hours," said Dr. Vu Nguyen.
In the United States, twins account for only about 3 percent of live births, so having four sets of twins born on the same day at the same location is not something that happens every day.
"We believe this is the first time four sets of twins were born on the same day at Kaiser Permanente Baldwin Park Medical Center, and for sure in the past 23 years, according to our staff," hospital officials said in a statement.