Final answer:
Untreated gonorrhea may lead to infertility due to complications such as PID and inflammation of the reproductive organs. It can also cause life-threatening systemic disease and blindness in newborns if transmitted during childbirth.
Step-by-step explanation:
If untreated, gonorrhea may result in several serious health conditions. Specifically, the correct answer to the student's question is infertility. This is because gonorrhea can lead to Pelvic Inflammatory Disease (PID) in females and inflammation of the reproductive organs in males, both of which can result in infertility. However, it is important to note that untreated gonorrhea can also spread to the blood and cause a life-threatening systemic disease, and in the case of an untreated mother passing it to her baby during childbirth, can result in blindness due to eye infection. It is crucial for sexually active individuals, particularly those under 25 or with multiple partners, to get routine screening for STIs like gonorrhea to avoid these complications.