Uterine spasm stenosis ring

The local muscles of the uterine wall show a ring-shaped stenosis formed by spastic inconsistent contraction and continue to relax, which is called a uterine spastic stenosis ring. Narrow rings can occur in any part of the cervix and uterine body, mostly at the junction of the upper and lower sections of the uterus, or in a narrow part of the fetal body, which is common in the fetal neck and fetal waist.

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