There is also decreased neurogenesis and neuroplasticity in people experiencing depression (Dean and Keshavan, 2017), the opposite of which can be inferred to occur in romantic love because of its substantial neurobiological activity and elevated nerve growth factor (see Berry et al., 2012; Aloe et al., 2015; Shohayeb et al., 2018). The gene discussed is NGF; the disease is depressive symptom measurement.