Mom Gained 4 extra points on the scale in 16 hours Normal? RATs?

16 hours ago we weighd our rat who is due sum time today i hope. She gained 4 ounces over night is this normal lol. Pretty sure shes going into labor right now or soon I got a hand full of Milk when i picd her up and felt her belly squz now she had her egg and is fixing her nest again sure is funny to watch specail while she try's to step around her belly Shes just to cute Im gunna brag on her for a bit lol she was cleaning herself today when we got up and attempted to clean behind her sittin on top of her nest and tumbled down into the food bowl shes far to big Tee Hee