Why it is better to cut the baby's hair after 2 years? why not before?

Not medical reason: Dear NermeenS, as a mom doctor, I assure you that there is no medical reason behind a recommendation of when to cut a baby's hair. You will not cause harm or benefit to your baby. It is your decision, so, whenever you are ready, is the right answer. In my personal experience, after I cut my boys curls, they didn't come back...oh, well! good luck!