I'm not qualified to be a fireman, but if he has a room with two expectant mothers carrying fetuses, or one 6-month old baby, he will have to make a decision. My decision would be to call other firemen to the scene to improve the chances of all of them, saving all 5. I know fireman. They've pulled out dead bodies from many fires over a long career. I pray for and bless the firemen to have the strength to make the best decision. Prayer works, in case you are wondering.
First off, let's admire that fail of your convictions as you worm your coward ass out of an answer. So. I will make this clearer for you.
There is no time for the firemen to arrive, you go to one of the rooms, grab the occupant(s) and leave, that's all the time there is.
Secondly, the fetuses are not with their mothers. They are being kept in a machine, nice and healthy and perfectly viable. Your sort would actually call them 'babies' or 'children', but they are fetuses.
So, which do you save or do you let all three parish in the fire?
Now would be a good time to answer the question.