It's a good thing!: They are measuring the lining inside the uterus (the lining is the stuff that comes out with your period). It is 9 mm's wide, which is normal for someone your age. There are 2 layers to the lining, one from the top wall and one from the bottom wall, so that is why they call it "bilayer".
Answered 6/17/2019
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A doctor has provided 1 answer
A doctor has provided 1 answer
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