What hormone, produced by the placenta, helps relax the pelvis before labor?

The hormone that helps relax the pelvis before labor is relaxin. This hormone is secreted by the placenta as well as by the ovaries, and it plays a critical role in preparing the body for childbirth. Relaxin functions by softening the ligaments in the pelvis and relaxing the cervix to allow for easier passage of the baby during delivery. Its production increases during pregnancy and peaks just before labor, facilitating the necessary physical changes that support childbirth.

Understanding relaxin’s function is essential, as it helps the body adapt to accommodate the growing fetus and prepares the birthing pathway. This process is vital for a successful delivery, making relaxin an important hormone during pregnancy.