What layer of the uterus contracts to expel menstrual fluid and to push the fetus out of the womb during labor?

Question

Quizplus · Accepted Answer

The myometrium is the middle layer of the uterus composed of smooth muscle tissue that contracts during menstruation to expel menstrual fluid and during labor to push the fetus out of the womb. The perimetrium is the outer layer of the uterus, while the endometrium is the inner layer that lines the uterine cavity and thickens during the menstrual cycle to prepare for possible pregnancy. The perineum is the area between the vagina and anus in females.

What Layer of the Uterus Contracts to Expel Menstrual Fluid