Investigation of ovum transport in the oviduct: the dynamics of oviductal fluids in domestic rabbits

Ova are captured by the oviductal fimbria and rapidly transported to the am pullary-isthmic junction of the fallopian tube. Fertilized ova and oviducta l fluids are then carried medially in the fallopian tube, while undergoing maturation in preparation for entering the uterine cavity: where: nidation and further development take place. This movement of oviductal fluids was v isualized in a rabbit model with human chorionic gonadotropin-induced ovula tion, by injection of a contrast medium into the ampulla region of the ovid uct, Zn the ampulla, the opaque medium was observed to oscillate at 0 - 85. 4 mm/s, This medial transport of the fluid towards the uterus decreased to 0 - 9.6 mm/s in the isthmic portion of the tube. This decrease substantiate s previous findings that the transport of material in the isthmic portion o f the oviduct is more strongly under the control of ciliary action than und er peristaltic activity.