Even with all the stuff going on in the game, storing babies in the bank seems cruel.
It seems like the best solution if I want to keep them. The alternatives being:
A: Give them to Elise, which makes Lona sad.
B: Let them wonder off on their own (to undoubtedly be eaten by wolves or suffer some worse fate).
C: Let them loose in goblin den to be adopted by goblins? I doubt they would have a good life.
D: Keep them with me. The nursing isn't so bad, but the 20 lbs of weight is 20 lbs less I could carry.
I think it's best to keep them in the bank for now. If I knew they would age then I would feel differently. In the end I will take all the babies with Lona on her trip. It will be interesting, especially if she has a lot by then. xD
Also, miscarriage comes with a nasty red image of blood flooding from you and it is counted in your stats. You should be able to tell when it happens, unless you've just forgotten.
Is it immediate? She still has morning sickness, so I guess she is fine then.