What are the causes of repeated penises?

The cause of duplication of penis is not clear, may be related to environmental factors, genetic factors, etc.

1, environmental factors

When the embryo is affected by specific environmental factors during development, such as maternal infection, ionizing radiation exposure, exposure to harmful chemicals, etc., it may lead to longitudinal duplication of cloaca membrane, resulting in duplication of penis phenomenon.

2, genetic factors

duplication of penis may be related to genetics, if both parents or one party has defective genes, it may also be inherited to children, so that reproductive system development is abnormal, resulting in duplication of penis.