Final answer:
The most important risk associated with untreated chlamydial infection is infertility.
Step-by-step explanation:
The most important risk associated with untreated chlamydial infection is infertility.
If left untreated, chlamydia can spread from the cervix to the upper reproductive tract, including the uterus and Fallopian tubes, causing pelvic inflammatory disease (PID). PID can lead to permanent damage and increase the risk of ectopic pregnancy (in which the embryo implants outside of the uterus) or infertility.
Therefore, it is important to seek treatment for chlamydia to prevent these serious complications.