EGF and endometriosis: Interestingly, the initial induction of endometriosis was associated with activation of epidermal growth factor (EGF) signalling in the eutopic endometrium of the baboon model (Afshar et al., 2013) and EGF signalling was associated with up-regulation of TA in normal ovarian surface epithelial cells (Bermudez et al., 2008).