relaxin relaxin /rɪˈlæksɪn/

noun

1. Hormone secreted by the corpus luteum during the last days of pregnancy; relaxes the pelvic ligaments and prepares the uterus for labor  ( relaxin )
   hormone secreted by the corpus luteum during the last days of pregnancy; relaxes the pelvic ligaments and prepares the uterus for labor
    The hormone relaxin plays a vital role in preparing the body for childbirth.
   The hormone relaxin plays a vital role in preparing the body for childbirth.