What is the cause of a liquid dark area in the uterine cavity during pregnancy?

Patient's question:

No

Doctor's answer:

It might be a sign of threatened miscarriage, so I suggest you pay attention. If you have vaginal bleeding, I recommend you get checked and go to the hospital to see if it's an inevitable miscarriage. Also, anechoic areas don't necessarily mean miscarriage; they could be related to fluid accumulation in the uterine cavity. You need to regularly check up at the hospital.