"The oxytocin causes increased rhythmical contractions of the uterus, which have been postulated to cause increased transport of the sperm. A few sperm have been shown to traverse the entire length* of the fallopian tube* in the cow in about 5 minutes, a rate at least 10 times as fast as that which the swimming motions of the sperm themselves could possibly achieve. Whether this occurs in the human female is unknown."
Thank you for that Guyton & Hall: Textbook of Medical Physiology, 11th ed.
I can't imagine why a woman would shy away from being involved in the study to finally crack that mystery. Nothing is sexier than a man in a lab coat with a stopwatch.
How is one supposed to be impressed by this time trial without the knowledge of the length of said cow fallopian tube?? I hope they pick up this oversight for the 12th ed.