A compound attribute that is the ratio of amount of multiple epidermal growth factor-like domains protein 9 (human) in blood to amount of oxytocin-neurophysin 1 (human) in blood. The trait is OBA_2053800 (MEGF9/OXT protein level ratio in blood). Also known as: the ratio of amount of multiple epidermal growth factor-like domains protein 9 (human) in blood to amount of oxytocin-neurophysin 1 (human) in blood.