Fertility and tubal morphology after microsurgical removal of segments of the porcine fallopian tube.

A controlled study was carried out in the pig to determine the effect on fertility of resecting either the ampullary-isthmic junction or the isthmus. In both treated groups, the nidation index was lower than that in the control animals. The index was not significantly lower in the isthmic resection group than in the ampullary-isthmic junction group. The implications of these findings in terms of fallopian tube physiology and human tubal reconstructive surgery are discussed.