Per the CDC:
Chlamydia is a common STD that can cause infection among both men and women.
It can cause permanent damage to a woman’s reproductive system. This can make it difficult or impossible to get pregnant later. Chlamydia can also cause a potentially fatal ectopic pregnancy (pregnancy that occurs outside the womb).
Laboratory tests can diagnose chlamydia. Your healthcare provider may ask you to provide a urine sample for testing, or they might use (or ask you to use) a cotton swab to get a vaginal sample.
The only way to completely avoid STDs is to not have vaginal, anal, or oral sex.
If you are sexually active, the following things can lower your chances of getting chlamydia:
Being in a long-term mutually monogamous relationship with a partner who has been tested and does not have chlamydia; and
Using condoms the right way every time you have sex.
To learn more visit: STD Facts - Chlamydia (cdc.gov)