Living room

The living quarters is a room that can be built in Fallout Shelter.

Overview
The living quarters allow you to increase the population limit for your vault, and potentially allows vault dwellers to create a baby. It is one of the facilities available at the start of the game.

Two dwellers of the opposite sex will talk, and eventually dance, followed by rushing to the bedroom to make the female dweller pregnant. You must be actively playing for the last step to occur. How long it takes depends on the Charisma stat of the dwellers. Pregnancies last for three hours, and it takes three additional hours for the child to become an adult.

During an incident, pregnant dwellers and children will hide in living quarters until the threat is cleared.

Bugs
Female dwellers can glitch into a permanent pregnant state; suspected to be caused by removing the room they conceived in before giving birth.