The statistical test results were obtained by an analysis of stepwise regression. The efficacy was related to gestational ages,β hcG, fetal heart beat before treatment, vaginal bleeding before treatment and the side effects after injection of MTX; 经逐步回归分析表明:治疗效果与化疗前患者的孕龄的长短、血β-hcG值的高低、是否有胎心及阴道出血量、注射MTX后副反应出现率有关;