I am always accomodating to session changes as i understand that things happen in life, but i am running a small business so these changes can impact me significantly.
For newborn session we only pencil in a date and then confirm a date once baby has arrived. Once this is locked in if you need to change the date there will be a fee of $100
For maternity or family sessions i will make one change of date with no fee, after this i will charge $100.
This is because i only take a number of clients per month, if you keep changing dates it may prevent someone else having a sesison and of course impacts my income.