Congenital laryngeal web is a rare birth defect that occurs when the larynx (voice box) does not form properly during fetal development. The exact cause of this condition is unknown, but it is believed to be related to genetic factors, environmental factors, or a combination of both. Possible causes include:
1. Genetic mutations: Certain genetic mutations can cause the larynx to form abnormally.
2. Environmental factors: Exposure to certain environmental toxins or medications during pregnancy may increase the risk of congenital laryngeal web.
3. Chromosomal abnormalities: Abnormalities in the number or structure of chromosomes can lead to congenital laryngeal web.
4. Infections: Infections during pregnancy, such as rubella, may increase the risk of congenital laryngeal web