my first child was born with some of her toes partly joined. it won’t affect her walking so they don’t operate on this on a child. if they did there would be unsightly big scars. it’s a genetic thing and apparently there is a fifty fifty chance of passing it on to your child, but they might have completely joined fingers/toes or not show any signs of having the gene at all. a relative who had fingers joined including the fingernails had surgery a few times and can now play the piano. the scars are between the fingers where they were once joined and don’t look too noticeable. often when there is one genetic issue the doctors will look out for others too with extra vigilance. sometimes where there are joined fingers or toes, there may also be extra digits- skin tags/extra finger etc. if you’re child has this or it runs in your family, don’t worry as they are fixable with surgery.