In what fluid does the sperm swim in the oviduct? We know that after sexual intercourse, sperm enters the female body and continues to pass through the oviduct by swimming. "Swimming" implies the presence of fluid. I want to know what that fluid is called. Also could you please tell me the color of that fluid? Is it yellow/off-white?

Specifically in the fallopian tubes, the fluid is called _tubal fluid_ , and is produced by the innermost mucosal layer of the tubes (specifically, the peg cells in the epitelium)

* In the follicles, there is the follicular fluid, _liquor folliculi_.
* In the uterus, the endometrial fluid.
* In the cervix, cervical fluid.



I don't know about the color. For what it's worth, cervical fluid varies from white to yellowish, but it's transparent when it's best for spermatozoa to swim.