My two youngest have a dimple, ds2 is quite deep... But both completely healthy its very common to have a dimple if you google 'spina bifida occulta' you'll find some info about what the others were talking about, its really quite far removed from what people usually associate with spina bifida. FWIW I also know of a woman who had 8 children with spina bifida occulta and NONE of them had any developmental issues or delays! Hth