The foramen ovale is by far the most common congenital heart disease in adults. The foramen ovale is formed when the embryo develops to 6-7 weeks, and when the newborn cries after birth, the sudden increase in pressure in the left atrium causes a functional closure of the left primary septum partly immediately above the right secondary septum, thus achieving anatomical closure one year after birth. Therefore, if the foramen ovale has not closed by the age of three years after birth, it is clinically referred to as an unclosed foramen ovale. In this case, surgery for closure may be an option under the advice of the doctor.