Carrying four babies at once is rare – and pretty amazing. Here's how quadruplets form, and how to care for yourself through this extraordinary pregnancy.

Rachel and Marco Vargas welcomed their quadruplets — Sofía, Philomena, Veronica and Isabel Campos — on Jan. 24 Erin Clack is a Staff Editor for PEOPLE. She has been writing about fashion, parenting ...

Aja Kennon, 33, and her fiancé, Emmanuel Volmar, 37, unexpectedly expanded their family by four. Courtesy of Cooperman Barnabas Medical Center This family got four times the cuteness. A New Jersey ...