hormone secreted by the corpus luteum during the last days of pregnancy; relaxes the pelvic ligaments and prepares the uterus for labor
详细解释
re.lax.in n.（名词）A female hormone secreted by the corpus luteum that helps soften the cervix and relax the pelvic ligaments in childbirth.耻骨松弛激素：由身体卵巢分泌的雌性荷尔蒙，能帮助生产时放松子宫颈并且放松骨盆韧带
