Final answer:
The term for pus in the fallopian tubes is 'pyosalpinx', which can be a result of infections like PID, affecting the female reproductive organs. Fertilization typically occurs in the fallopian tubes, and obstructions in these tubes might require treatments such as IVF or surgery.
Step-by-step explanation:
The term that means "pus in the fallopian tubes" is D. pyosalpinx. Pyosalpinx is a condition that occurs when the fallopian tubes are filled with pus due to an infection, such as Pelvic Inflammatory Disease (PID). This infection typically originates in the vagina and can spread to the cervix, uterus, fallopian tubes, and ovaries, often caused by sexually transmitted bacteria like Neisseria gonorrhoeae and Chlamydia trachomatis.
Fertilization of the egg by the sperm typically occurs in the fallopian tube, which is also known as the oviduct. If the fallopian tubes are obstructed, it could hinder the process of fertilization. Treatment options in such cases include in vitro fertilization (IVF) or surgical interventions that could include the removal of the obstruction or the ligation (sealing) of the fallopian tubes.