The phrase "round ligaments" refers to a part of the female reproductive system. These are thin, stretchy bands that support the womb and help it stay in the right position. Full definition
By using a wedge under the growing uterus at night, the mother can avoid the overwhelming majority of round ligament pain during the day. (fairhavenhealth.com)
This discomfort is called round ligament pain, and it's a common pregnancy symptom. (doctor-info.website)
As your unborn child gets bigger you might experience round ligament pain as the weight of your baby puts increasing pressure on your joints. (pregnancy-info.net)