Maria Rios gave birth at 11:58 p.m. on New Year's Eve to twin number one, Joaquin.
His twin sister was breech and had to be delivered via C-section.
She was born at 12:16 a.m., just 18 minutes after her brother, but technically in the new year.
Doctors say the twins were their last born baby of 2017 and first born of 2018.
Report a typo to the ABC13 staff