The POP-Q (Pelvic Organ Prolapse Quantification) system uses a fixed reference point for all measurements. That reference point is:

• A The ischial spine
• B The external cervical os
• C The hymen ✓
• D The posterior fourchette

Explanation

The POP-Q system, developed by the ICS/AUGS, uses the hymen as the fixed reference plane (landmark 0). Measurements proximal to the hymen (inside the vagina) are expressed as negative numbers; those distal (outside) as positive numbers. Six points are measured: Aa, Ba (anterior wall), C (cervix/vaginal cuff), D (posterior fornix), Ap, Bp (posterior wall), plus GH (genital hiatus), PB (perineal body), and TVL (total vaginal length). Stage II = ≤1 cm above or below the hymen; Stage III = >1 cm beyond the hymen.

Reference: Shaw's Textbook of Gynaecology, 17th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.