I didnt use anything in DS bath until he was a few months old, despite my mother insisting I needed to.
When I did start putting things in to his bath it was QV bath oil.
I was good for me too becuase all the hand washing you do with a newborn left me with dermatitis galore.
I also found I couldnt wear the perfume and normal skincare products that I used to as they upset DS when he was very little.

SaraJane - it depends on a few things, theres barrier balms and then there are nappy rash creams. Depending if you are using cloth or disposable will affect what you use as well. I only teneded to use something when DS had nappy rash, which was noramlly pawpaw ointment, or sudocream on the occasion it was bad.