The narrow waist of the uterus, lower uterine segment during pregnancy, is called what?

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Multiple Choice

The narrow waist of the uterus, lower uterine segment during pregnancy, is called what?

Explanation:
The narrow waist of the uterus is called the isthmus. It is the junction between the main body of the uterus and the cervix, a constricted region that forms a “waist” as the uterus transitions downward. The fundus is the dome-shaped top portion, the body is the central/main portion, and the cornua are the horns where the fallopian tubes connect (not the waist). In pregnancy, the lower uterine segment forms below the body, but the term for the narrow waist remains the isthmus.

The narrow waist of the uterus is called the isthmus. It is the junction between the main body of the uterus and the cervix, a constricted region that forms a “waist” as the uterus transitions downward. The fundus is the dome-shaped top portion, the body is the central/main portion, and the cornua are the horns where the fallopian tubes connect (not the waist). In pregnancy, the lower uterine segment forms below the body, but the term for the narrow waist remains the isthmus.

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