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 Hegar's sign is a non-sensitive indication of pregnancy in women—its absence does not exclude pregnancy. It pertains to the features of the cervix and the uterine isthmus. It is demonstrated as a softening in the consistency of the uterus, and th ...
.
References
Uterus
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