Methods:504 pa tients with infertility due to one or both fallopian tube obstruction were t reated with selfmade selective fallopian tube recanalization catheter by mea ns of improved technique.

• 方法：504例经证实有一侧或双侧输卵管不通的不孕症患者，采用自制选择性输卵管再通导管进行再通。