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Understanding Chlamydia Progression Timeline
March 31st, 2026

How Long Can Chlamydia Go Untreated Before It Causes Damage?

Chlamydia can cause permanent damage within weeks to months if left untreated. Most complications develop after 3-6 months of untreated infection, though pelvic inflammatory disease (PID) can occur in as little as 2-4 weeks. In women, untreated chlamydia causes PID in 10-15% of cases, potentially leading to infertility, chronic pelvic pain, and ectopic pregnancy. Men may develop epididymitis, which can cause testicular pain and scarring. Studies show that 15-20% of women with untreated chlamydia develop tubal scarring that affects fertility. The infection progresses silently in 75% of women and 50% of men, making regular STI testing crucial for sexually active individuals.

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