KDR and endometriosis: The meta-analysis showed that anti-VEGF/VEGFR treatment had a significant inhibitory effect on endometriosis size (SMD –0.96, 95% CI –1.31 to –0.62), reduction of endometriosis weight (SMD –1.70, 95% CI –2.75 to –0.65), and endometriosis score (SMD –1.17, 95% CI –1.65 to –0.69) when compared to control animals.