Which internal female organ expels the fetus during delivery?

The uterus is the internal female organ responsible for expelling the fetus during delivery. Throughout pregnancy, the uterus expands to accommodate the developing fetus and provides a suitable environment for growth. When labor begins, muscular contractions of the uterine wall, known as uterine contractions, intensify and work to push the fetus downward through the birth canal.

As the uterus contracts, it facilitates the gradual dilation of the cervix, allowing the fetus to move into the cervix and eventually into the vagina, where delivery occurs. This coordinated effort between the uterus and other structures, such as the cervix and vagina, is essential for a successful delivery. The strength and rhythm of uterine contractions are pivotal in propelling the fetus out of the uterus and into the world, making the uterus a crucial organ during the process of childbirth.