The expression levels of NGF and its receptor TrkA in ovarian cancer and cervical squamous cell carcinoma are significantly increased and related to the proliferation and metastasis of ovarian cancer as well as the clinical grade and nerve infiltration of cervical cancer (Tapia et al., 2011; Streiter et al., 2016; Retamales-Ortega et al., 2017; Long et al., 2018; Faulkner et al., 2020). The gene discussed is NGF; the disease is ovarian cancer.