My daughter isis 24 yrs old and 24 weeks pregnant and her ultrasound at 20 weeks showed a bright spot on the baby s heart. She had another ultrasound yesterday that still shows the bright spot. Her quad screen came back negative. I know they say it s a soft marker for downs, but what are the chances of that? Everything else looks good according to dr. Also what does it mean, what could it be, and if it s nothing, why is it there??