yeah i feed all my females thru out cooling and mating, i give them acsess to heat 24/7 when they have fed thou, but they will still spend a lot of time on the cold side.
When they refuse food its normally one of the first signs that they have conceived.
It actually helps with egg production imo, not hinders it, as most of the food is used to produce eggs and there fore very little fat reserve is needed and the animals tend to be in rather good condition once they have layed compared to females that dont feed during this time and need to use their fat reserves to produce eggs. Works for me with all species of python that i breed.