I would ask as well, why book at 38 weeks? If you have big bubs, then that shouldn't be a huge (pardon the pun) factor or do you have any underlying medical issues such as pre-ecclampsia. I know they will want to book me for a c-section and I have said that is fine, at 40 weeks, no earlier, but that is cause I want to be pregnant for as long as possible.

It will be your choice, if it is a booked c-section, maybe ask to be done at 39 weeks to move it away from your other LO's birthday?