What does the sacrum do during childbirth?

The sacrum plays several crucial roles during childbirth:

*Pelvic Stability and Support:

The sacrum forms a keystone-shaped structure at the base of the spine and connects to the hip bones. It provides stability to the pelvis, offering support to the uterus and the developing baby as they grow during pregnancy.

*Flexion of the Spine:

During labor, the sacrum works in conjunction with the vertebrae of the spine to facilitate flexion, or bending, of the lower back. This movement helps create the necessary space in the pelvis for the baby's descent and delivery.

*Rotation and Alignment of the Pelvis:

The sacrum is instrumental in the proper alignment of the pelvis for childbirth. It acts as a pivot point for the pelvic joints, allowing them to rotate and readjust during labor to facilitate the baby's passage through the birth canal.

*Counter-Pressure for Contractions:

As uterine contractions push the baby down the birth canal, the sacrum provides counter-pressure to the mother's spine and pelvis. This counter-pressure helps stabilize the mother's body and reduces strain on the lower back during contractions.

*Sacral Nerve Stimulation:

The sacrum contains a plexus of nerves called the sacral plexus, which plays a crucial role in transmitting signals from the spine to the pelvic muscles and organs. Adequate stimulation of the sacral plexus can contribute to efficient and effective uterine contractions during labor.