I just came into some gliders and i need some info. The lady that gave me them said that one of the females was pregnant

, but I've got no clue what to look for for signs of pregnancy or anything. I would appreciate it a lot if someone would help me out.
I've got 2 pairs and a single female. One of the males in the pairs is altered, or so I'm told. I've been feeding them super worms, glider chow, f/t pinkies, fruit cocktail, honey, and lettuce spines/leaves.