Kim and Kanye choose Chicago for their new baby's name

The Associated Press</span>
Published Friday, January 19, 2018 2:15PM EST
Last Updated Friday, January 19, 2018 2:18PM EST

It's Chicago -- where Kanye West was raised -- as the name of baby No. 3 with Kim Kardashian West.

Mom made the announcement Friday on her app without explanation. Chicago was born Monday, weighing in at 7 pounds, 6 ounces. She joins big sister North and middle brother Saint.

Chicago was born Monday via gestational carrier, meaning Kardashian West's fertilized egg was implanted into a surrogate.

The rapper and the reality star chose to use a gestational carrier after Kim suffered pregnancy complications with her two older children. She said her doctors told her it wasn't safe for her to carry another baby.