Many mothers-to-be will find “a strong light spot in the left ventricle of the fetus” on the ultrasound sheet after the big malformation screening at 23 weeks of pregnancy, and they are worried about it. The first thing you need to do is to get a good idea of what you are getting into. The ultrasound machine is now improving in resolution, so sometimes it will show some of the muscles in the fetal heart, suggesting strong light spots in the ventricles. 2, if you have not done the serum Down’s screening, the general situation can also be further follow-up ultrasound, if there is no increase in the light point, etc., there should not be a big problem. 3, really very worried mother, you can make amniocentesis, for the final exclusion!