So, one of my Dwellers is pregnant, i'm just curious how long it takes until she gives birth, and should i leave her in the living quarters? or is it ok to send her back to work?

Put her to work! the only thing with pregnant dwellers is they will flee a room if there is fire, rad-roaches or raiders. So, don't count on them to help if there is a problem. But they will work just fine.

I'm not sure exactly how long until they give birth, but it's more then an hour and less than 8 hours.

Wish there was an progress bar when you tapped on them.

3 hours to birth

I've had about 3 vaults destroyed in raft patch attacks because I had a lot of pregnant women. P.S. I'd advise you don't equip them with weapons because the will book it to the safety of a hidden room during disasters or attacks and you can't take it back until they come out

My advice: when you have a lot of pregnant women just put them all in either the room that requires the stat they have the highest or living quarters but don't give them a weapon because they'll just run flailing their arms during disasters and attacks

I allow my pregnant women weapons, after all they won't be pregnant forever.

I put my pregnant women to work... oh wait were talking about Fallout Shelter