Pelvic Inflammatory Disease (PID) and Missed Periods: What You Need to Know

Yes, PID can cause menstrual irregularities including missed periods.

Mechanisms

• Tubal damage: Inflammation/scarring of fallopian tubes → impaired oocyte transport, disrupted hormonal signaling.
• Ovarian involvement: Tubo-ovarian abscess, periovarian adhesions → altered follicular development/ovulation.
• Endometritis: Uterine lining inflammation → abnormal shedding.
• Systemic illness: Stress, cytokines (IL-1, TNF-α) → hypothalamic suppression → anovulation.

Other PID Symptoms

• Lower abdominal/pelvic pain (bilateral).
• Abnormal vaginal discharge (purulent, malodorous).
• Fever, chills.
• Dyspareunia, dysuria.
• Intermenstrual/postcoital bleeding.

Diagnosis

• Clinical (CDC criteria: pelvic pain + cervical motion/uterine/adnexal tenderness).
• NAAT for GC/CT, wet mount, CBC, ESR/CRP, pregnancy test.
• Ultrasound if TOA suspected.

Treatment

• Empiric antibiotics (CDC: Ceftriaxone 500 mg IM + Doxycycline 100 mg BID × 14 days ± Metronidazole).
• Partner treatment essential.
• Hospitalize if: pregnant, TOA, severe illness, unable to tolerate PO, surgical emergency not excluded.

Sequelae

Infertility (20% after 1 episode), ectopic pregnancy (6–10× risk), chronic pelvic pain. Early treatment prevents damage.