Rodriguez-Martinez H, Larsson B, Einarsson S
Acta Vet Scand. 1985;26(2):218-30. doi: 10.1186/BF03546553.
The effect upon the reproduction of total resection of the oviductal isthmus, including the uterotubal and ampullary-isthmus junctions followed by end-to-end ampullo-cornual anastomosis was studied in pigs. Normal cycling gifts of proved fertility were submitted to bilateral isthmus deletion (Group I). Other gilts were submitted only to unilateral isthmic resection, while their contralateral medial isthmus was transversally cut and reanastomosed (Group II). A significantly lower nidation index was obtained after bilateral isthmic resection. The gilts in Group I which did not become pregnant and those in Group II were successfully mated during forthcoming standing oestruses, and were in association to that slaughtered on days 3, 4, or 5 of the cycle, and the characteristics and location of ova were determined. Spermatozoa fertilized the ova, and those cleaved normally in the isthmic-resected tube as well as in the sham-operated oviducts. The isthmic-resected oviduct, however, did not transport cleaved ova into the uterus at the time expected as normal. The findings suggest that the fertilized pig ova cannot reach the uterus at the normal expected time in case of total absence of the isthmic part of the oviduct, resulting in impaired fertility.
在猪身上研究了输卵管峡部全切除（包括子宫输卵管和壶腹 - 峡部连接处）并进行端对端壶腹 - 子宫角吻合术对生殖的影响。将已证实具有生育能力的正常发情母猪进行双侧峡部切除（第一组）。其他后备母猪仅进行单侧峡部切除，而其对侧内侧峡部进行横向切断并重新吻合（第二组）。双侧峡部切除后着床指数显著降低。第一组未怀孕的后备母猪和第二组的后备母猪在随后的发情期成功交配，并在周期的第3、4或5天屠宰，确定卵子的特征和位置。精子使卵子受精，并且在峡部切除的输卵管以及假手术的输卵管中卵子正常分裂。然而，峡部切除的输卵管没有在正常预期的时间将分裂的卵子输送到子宫。研究结果表明，在输卵管峡部完全缺失的情况下，受精的猪卵子无法在正常预期时间到达子宫，导致生育能力受损。
