If the patient has mitral stenosis, the decision on whether to have children should be based on the size and extent of the narrowing. This is because, in the late stages of pregnancy, this condition can be life-threatening, especially as it can lead to heart failure. This occurs because blood volume increases and the heart is overloaded, which is very dangerous. It can cause the fetus to develop certain diseases due to ischemia and hypoxia, potentially endangering its life. Since mitral stenosis is a type of congenital heart disease, surgical treatment is sometimes necessary to alleviate the condition. The decision to have children can vary depending on individual differences and is not absolute. If the symptoms are severe, it is recommended not to have children.