Uterine isthmus

Uterine isthmus
Uterine isthmus labeled at 12
Details
Identifiers
Latinisthmus uteri
Anatomical terminology

The uterine isthmus is the inferior-posterior part of uterus, on its cervical end — here, the uterine muscle (myometrium) is narrower and thinner. It connects the body and cervix.

The uterine isthmus can become more compressibile in pregnancy, which is a finding known as Hegar's sign.

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