This is a study using light microscopy and electronic microscopy of Fallopian tube subjected to sterilization; and compare it with a control group. A total of 60 samples from patients with different surgical procedures, whose age was from 20 to 40 years; they were amenorrheic, without antecedents of pelvic inflammatory disease nor endometriosis. Among the control group, there were lesions as isthsmical nodular salpingitis in 30.7%. There was chronic salpingitis in 15.3%; follicular salpingitis in 23%, and polyps in 15%. In the group with OTB antecedents, endosalpingiosis was found in 20%; follicular salpingitis in 30% and chronic salpingitis in the remaining 50%. By means of electronic, ultrastructural microscopy, were seen lesions at myosalpinx level, that is, alterations in myofilaments, formation, much fibrosis and descilliation in the adjacent to OTB. It may be concluded that these findings, never seen before, may condition an alteration of tubal motility in patients subjected to rechannelization procedures, that condition an alteration in gametes transportation, avoiding fecundation or a greater incidence ectopic pregnancy incidence.