My child was born without metopic ridge, yet a definitive ridge has now formed. her head growth has been normal. she is now 1. should i be concerned?

See pediatrician: It may not be anything to worry about, but your pediatrician should evaluate not only the child's head growth (head circumference) but also the shape of the head. Just having a ridge in and of itself does not always mean that something is wrong, but when it associated with an abnormality of the shape of the skull, it can be a problem.