The mnemonic
PIDDLE
What each word stands for
- PPrevious ectopic pregnancy
- IIUCD in situ
- DDamaged tubes, tubal surgery
- DDisease: PID, chlamydia
- LLate (assisted) reproduction, IVF
- EEndometriosis
Why it matters clinically
Prompts early ultrasound in a woman with such risks and pain or bleeding.
Where it stops being reliable
Half of ectopic pregnancies occur with no known risk factor.
Teaching aid, still awaiting independent review. Confirm facts in a standard source.