Your pelvis is made up of two large bones that form a basin with an opening in the bottom. They're attached by cartilage and ligaments to the lower part of your spine in the back and to each other in the front.
Pelvic floor muscles form a sling that supports your growing uterus and baby within the pelvis during pregnancy.
At around 36 weeks, your baby starts to drop lower into your pelvis. This is called lightening and it's a sign that your body is getting ready for labor.
Your body secretes hormones during pregnancy that soften the pelvic ligaments, allowing the pelvis to open a bit so your baby can pass through during labor and delivery. The pelvic floor muscles spread apart as uterine contractions move your baby down the birth canal.
Isn't your body amazing?
Video production by Kino Bino.