KLF9 and endometriosis: In an earlier study, we showed, using an immunocompetent mouse model of endometriosis, generated with intraperitoneal administration (ip) of endometrial fragments null for the progesterone receptor interacting protein Krüppel-like Factor 9 (KLF9), that high-fat diet (HFD) promoted endometriosis progression in the absence of ovarian dysfunction, insulin resistance, and significant increase in bodyweight (Heard et al., 2016).