relaxin

noun Biochemistry, Pharmacology.

1. a polypeptide hormone produced by the corpus luteum during pregnancy that causes the pelvic ligaments and cervix to relax during pregnancy and delivery.

noun

1. a mammalian polypeptide hormone secreted by the corpus luteum during pregnancy, which relaxes the pelvic ligaments
2. a preparation of this hormone, used to facilitate childbirth

n.

1. A female hormone secreted by the corpus luteum that helps soften the cervix and relax the pelvic ligaments in childbirth.