PGR and neoplasm: Zhou et al. [39], Padala et al. [14], Przybylowska et al. [12], Lei et al. [30], and Ghilardi et al. [23] did not show any associations between the genotype distribution of MMP1 rs1799750 and age, tumor size, tumor stage and type, ER/PR status, lymph node status, distant metastasis, ethnicity, and menopausal status.