Surgical alteration of the mesosalpinx and its influence upon ovarian ovulatory function in the rabbit

Ovarian ovulatory function as correlated with the production of corpora lutea was studied in 58 rabbits that were subjected to unilateral surgical procedures. Initially, a resection of 50% of the isthmus and 50% (n = 8) or all (n = 8) of the corresponding mesosalpinx was performed. Next, 50% of the ampulla and 50% (n = 7) or all (n = 8) of the corresponding mesosalpinx was resected. Finally, a variable length, either one third, two thirds, or all, of the ampulla (n = 27) was dissected from the adjacent mesosalpinx. After natural copulation of the animals, without administration of gonadotropin, the numbers of corpora lutea on the operated and control sides were counted. A slight but nonsignificant overall reduction in corpora lutea on the operated side was observed. This showed no correlation either to the amount of mesosalpinx resected or the proximity of the surgical procedure to the ovary. Also, no correlation was observed with the length of dissected ampullary part.