Microsurgical fimbriectomy with removal of the fimbria ovarica was performed on one side in 19 rabbits. The other tube was left intact as a control. In 10 animals the new ostium was left free, some distance from the ovary. In the remainder, the ostium was fixed to the ovarian capsule. Three animals with a fixed ostium developed mild hydrosalpinx even though the neostomy was patent. Of the remaining 16 rabbits, 15 conceived and became pregnant in both uterine horns. There was no significant difference between nidation index on the two sides. It is concluded that intact fimbriae with a fimbria ovarica are not essential for normal ovum capture. It is therefore suggested that methods for clinical salpingostomy may require re-evaluation.