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Dr Anitha Anchan | Updated: March 4, 2014 7:10 pm. Tags: Birth Defects Gum disease Oral Health Cleft lip Tongue tie. It is likely that you have seen kids with a cleft in the lip sometimes continuing into the palate (or roof of your mouth) or tooth/teeth missing from birth. Well, these are what are called congenital anomalies or birth defects.
In about 1 in every 2,000 to 3,000 births, these natal teeth, or fetal teeth, make an appearance [source: MedlinePlus]. They're often removed to spare a nursing mother from discomfort and to prevent the baby choking on them should they fall out. But that isn't the usual progression, of course.