There are many clinical factors that may cause hydrocephalus in the fetus, which may be caused by the following factors: 1. It may be caused by genetic factors, such as chromosomal abnormalities in both spouses, which may lead to hydrocephalus in the fetus. 2. The fetal hydrocephalus can also be caused by the obstruction of the cerebrospinal fluid circulation pathway, which can increase the amount of fetal hydrocephalus and lead to hydrocephalus. Exposure to toluene, etc.