The foramen oval is a small hole in the left and right atrial septum of the human fetus, and the foramen of the oval is closed after birth.
The foramen oval is the vital passage necessary for fetal development and refers to the channel located between the left atrium and the right atrium. The fetus in the uterus, through the placenta and umbilical vein, umbilical artery, the blood is delivered to the right atrium, a part of the placental blood through the oval hole into the left atrium, left ventricle, into the ascending aorta, brain and upper limbs, in order to provide the fetal brain and body development needs oxygen and nutrients. The foramen of the oval must be open to supply circulation, so the foramen is one of the important life channels of the fetal period.
The fetal oval foramen during pregnancy is generally about 4-6 mm, and greater than 8 mm is on the larger side. The foramen ovale is large, if there is no other manifestation, pregnant women do not have to worry too much, just do regular B ultrasound review to observe the development of the foramen ovale. The foramen of the oval is usually narrowed or closed before birth. There are also cases where the left atrial pressure rises with the child's first cry after birth, the foramen of the oval is not closed, and the ductus arteriosus is not closed, usually within three weeks.
There are also some babies that gradually close 3-12 months after birth, which is a normal physiological phenomenon, does not belong to congenital heart disease, and generally does not require any surgery. Your baby can be rechecked once at 3 months, 6 months, and 12 months to see if there are signs of closure. After the baby is born, the foramen of the ovary is not closed, and because of its small flow of separation, there are generally no obvious symptoms during infancy, which has no impact on physical health and does not require special treatment.
If the foramen of the egg is not closed when the baby is more than 3 years old, you need to go to the hospital to rule out heart problems.
There are also very few children whose ovale pores remain open and not closed for life, but do not have much effect on hemodynamics.