Short answer
IUDs and STIs intersect at exactly one moment, insertion day, then diverge completely.
Same-day STI screening at insertion prevents the brief transient PID risk; beyond that window, modern IUDs neither cause pelvic infections nor prevent STIs.
Condoms continue STI duty throughout, PID with an IUD follows standard treatment (usually keeping the device), and screening schedules run unchanged.
Continue with STI Screening for Sexually Active Adolescents with a Cervix and Pregnancy Planning and STI Screening for the directly connected guidance.
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See Tests & Prices →Insertion protocol in detail
Same-day chlamydia and gonorrhea screening (NAAT) with treatment started promptly for positives. Most protocols proceed with insertion rather than delaying contraception, since delay risks pregnancy while treatment handles infection.
Pregnancy exclusion precedes placement.
Counseling covers the transient risk window plus warning signs: worsening pain or fever in the days after insertion needs prompt evaluation, while expected cramping and spotting do not.
The Dalkon Shield legacy. And why it doesn’t apply
Modern safety data is frequently doubted because of the 1970s Dalkon Shield disaster (a device design promoting infection, withdrawn decades ago).
Current hormonal and copper IUDs have fundamentally different designs with extensive safety surveillance: beyond the insertion window, PID risk matches non-users.
Historical fear should not block modern contraception. But it explains why the question persists, and clinicians should address it directly rather than dismissing it.
Living with IUDs and STI risk
Screening schedules continue unchanged.
Condoms continue for STI protection with non-monogamous or new partners.
String checks establish a baseline feel for expulsion awareness.
Abnormal bleeding, discharge, or pelvic pain get evaluated identically with or without a device. The IUD neither explains symptoms away nor complicates workups.
PID with an IUD in place
Standard broad-spectrum antibiotics per PID guidance, with device retention through mild-to-moderate treatment. Removal is reserved for tubo-ovarian abscess, severe illness, or failure to improve at 72 hours, not reflex.
Partners get simultaneous treatment.
Fertility after treated PID with retained IUD follows standard post-PID counseling.
When to seek care
For insertion visits (confirm same-day screening explicitly), promptly for post-insertion pain, fever, or unusual discharge, routinely for STI screening on schedule, and for removal or replacement planning at device lifespan or preference change.