Quadruplets are unusual enough.
To have identical quadruplets, that only happens every one-in-eleven million births.
But just after midnight on Monday, Ornsee Khamsa and Verek Muy of Sacramento welcomed four identical quadruplet girls into their family. The babies are named Preana, Audreana, Natalie and Melody.
A multiple births Web site says there have been only 26 sets of identical quads born since 1930, 17 of them female.
Doctors say they expect the four babies to be fine.