Histology of proximal tubal occlusion**Presented in part at the twenty-fourth annual meeting of the Armed Forces District, American College of Obstetricians and Gynecologists, New Orleans, Louisiana, October 6–10, 1985.††The opinions and assertions expressed herein are those of the authors and are not to be construed as official or as the views of the Department of the Army, the Department of the Navy, or the Department of Defense.