What is a negative drum structure in a 6.3mm diameter uterus and does it affect fertility?

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Hello doctor! I had an abdominal ultrasound, the doctor concluded that the negative drum structure in the uterine cavity was 6.3mm in diameter and the HCG test was negative, not pregnant. So the doctor asked me, I have an abdominal ultrasound with an acoustic drum in the uterus, what is the diameter of 6.3mm and does it affect fertility? Looking forward to your advice, thank you doctor!
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Hello, the doctor would like to answer the question: “Is there a negative drum structure in the uterus with a diameter of 6.3mm and does it affect fertility? ” as follows:
According to the ultrasound and HCG test results that you have, you are not pregnant at the moment, .. but how is your period? Is it regular, and is there a delay in menstruation this month, if so, how long?
The 6.3 mm negative drum bag in the uterus can suggest an early pregnancy but it can also be just a fluid bag, so I will check and ultrasound again after 1 week if still not found menstrual back.
If you have abdominal pain or bleeding, you must go to the emergency room right away
If you still have questions about this problem, you can go to a hospital under Vinmec Health System for examination and consultation by a specialist doctor. The obstetrician has professional qualifications for examination and consultation. Thank you for trusting and sending questions to Vinmec. I wish you a lot of health. Best regards!

Answered by Specialist Doctor I Le Thi Phuong - Obstetrician and Gynecologist - Department of Obstetrics and Gynecology, Vinmec Ha Long International Hospital