What's it mean to have congenital abnormalities?

Please see below. Congenital abnormalities are physical differences in the body that are present at birth;each body part has the potential to have an anomaly.Some are genetic, some are due to things that happen in the womb, & some happen for unknown reasons.These differences can vary from minor anomalies (like an extra finger or an ear tag) that don't affect function, to major defects that can be fatal.
Congenital... ...Means present at birth, and an abnormality is anything that isn't right. Can be something as minor as a skin tag, or as devastating as the vary rare ectopia cordis (heart outside the chest).