Relaxin is a hormone in our bodies that helps loosen and relax certain muscles, ligaments, and tissues. It is important during pregnancy as it prepares the body for childbirth by making the pelvic area more flexible. Full definition
♦ Hip and PELVIC PAIN caused by the release of the hormone relaxin which prepares your body for labor. (amazon.co.uk)
In preparation for childbirth, the body releases a hormone called relaxin in addition to progesterone. (balancingjt.com)
The importance of relaxin in breast milk is still unknown, but its function may be related to the newborn's stomach and intestines. (verywellfamily.com)