NPS and endometriosis: CGRP is a neuropeptide with well-established roles in pain transmission, vasodilation, and neurogenic inflammation (Iyengar et al., 2017; Urits et al., 2020; Sohn et al., 2020), and emerging evidence also implicates CGRP in endometriosis lesion biology and pain signaling (Fattori et al., 2024; Raffaelli et al., 2021; Chaichian et al., 2024).