The starch grain and phenolsulphonphthalein (PSP) tests were used to investigate the patency of the fallopian tubes in five "repeat breeder" cows. Evidence of tubal lesions was determined in three cows on rectal palpation. Using the starch grain test, bilateral occlusion was determined in three animals, left sided occlusion was determined in one and right sided occlusion in another. Using the PSP test there was evidence of bilateral occlusion in two of the four coes which were tested. In four cows the genital organs were examined visually and by palpation at laparotomy and in two cows tubal occlusion was confirmed when they were flushed with saline, and patency restored. In one animal both ovaries were almost completely encapsulated, while in the fourth adhesions involving the fimbriae occluded the ostia. There were broken down and this cow was the only one which subsequently conceived.
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