Final answer:
The usual site of fertilization, which is not a function of the uterus, typically occurs in the fallopian tubes. The uterus is responsible for other reproductive roles such as embryo support, implantation site, sperm passageway, and muscle contraction during labor.
Step-by-step explanation:
The function that is not a uterine function is C) Usual site of fertilization. The uterus serves several crucial reproductive roles, but it is not the site where fertilization typically occurs. Fertilization commonly takes place in the fallopian tubes, which transport the egg to the uterus. The main functions of the uterus include: providing protection and support for the developing embryo (A), serving as the site of implantation (B), acting as a passageway for sperm (D) during intercourse, and with its smooth muscle layer, enabling muscle contraction for labor and delivery (E).