I've heard of women having two put back and ended up with triplets
Imagine if you'd put back 2 embies
My mother is a twin (boy/girl) and she had two sets of twins (boy/girl as well) and survived
even despite having a singleton 10mos after the first set LOL. I am a twin but didn't have twins (nor my brother but it wasn't UP to him anyways) My brother and I came 7yrs after that singleton.
I like your attitude, very practical.
good luck and will be looking for your updates