from what I have read this is not totally abnormal. but happens at times. I feed my gliders OHPW. they suggest preg. females get it with 1/2 cup of wamboroo mixed in the recipe instead of 1/4 cup to help mom with nursing and all the nutrients she needs. so a DOUBLE portion. ALSO the version of this made in
america called critterlove has a breeders version.
So a substantial increase in nourishment is called for preg mommies. but again since this is not so unusual to have happen even an increase in food doesnt guarantee a change in outcome. Having a happy home with toys, running wheel and large cage I personally believe would help.