Final answer:
The ovaries, which produce eggs and hormones, are held in the abdominal cavity by ligaments and are not located within the pelvic cavity.
Step-by-step explanation:
The pelvic cavity contains many of the structures of the female reproductive system, including the vagina, uterus, and Fallopian tubes (also known as uterine tubes). However, the ovaries are not located within the pelvic cavity; they are held in place in the abdominal cavity by a system of ligaments. The ovaries are responsible for the production of eggs (ova) and the secretion of hormones such as estrogen and are connected to the uterus via the Fallopian tubes. Fertilization of an egg by sperm typically occurs in the Fallopian tube before the fertilized egg continues its journey to the uterus. Therefore, the structure that is not located within the pelvic cavity is the ovaries (Option C).