On my Client Guide I have that I will provide no less than 50 images to my clients in their portfolio.
I don't have a limit on the number as it is simply impossible to cap the amount of photos and special moments recorded during a session.

Lots of clients take away around 80-100 photographs from their newborn session. I need to be sure I have completely captured every aspect of this precious new life. No tiny detail can be left behind. I also need to make sure I have captured the bonds and connections in the family in front of me. Mums, Dads, siblings... this is a huge time for them and also for their newest family member. If this all takes 100 photographs, then that is what we end up with.

I wouldn't have it any other way.