Why is a child born with a cleft palate?

Cleft lip and palate are considered birth defects and they occur during the baby's development in the uterus.

During the 6th to 10th week of pregnancy, the bones and tissues of a baby's upper jaw, nose, and mouth normally come together (fuse) to form the roof of the mouth and the upper lip. It is unclear what exactly causes these conditions but it has been found that hereditary factors can play a small role. Around one in three babies born with a cleft palate or a cleft lip may have a relative with the same or similar condition, or an associated chromosomal or genetic condition.

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Source: https://www.cedars-sinai.edu/Education/Medical-Library/

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