A small amount of tricuspid regurgitation found during fetal heart ultrasound suggests a slight developmental abnormality of the fetal heart, most of which do not require special treatment and can continue the pregnancy and be observed. If this phenomenon is found in the middle of pregnancy, the need for prenatal diagnosis, i.e. amniocentesis, should be analyzed in conjunction with the presence of other abnormalities. With the increase of gestational weeks, many of them will return to normal before the full term of pregnancy and can be checked regularly during pregnancy to observe the development; if a small amount of tricuspid regurgitation is found in the fetus in late pregnancy or at the full term of pregnancy, no special treatment is needed, and according to the comprehensive situation of the pregnant woman and the fetus, an appropriate way of delivery can be chosen, and after the birth of the child, a neonatal cardiac ultrasound can be performed to further evaluate the specific situation of the child’s heart. If there is no major problem and it does not significantly affect the development of the child, no special treatment is needed for the time being.