Mnemonics to remember the three branches of the posterior division of the internal iliac artery include:
- I Love Sex
- PILLS G
I Love Sex
- I: iliolumbar artery
- L: lateral sacral artery
- S: superior gluteal artery

PILLS G
- P: posterior division of the internal iliac artery
- IL: iliolumbar artery
- L: lateral sacral artery
- SG: superior gluteal artery
Hope those two mnemonics helped. Find more super useful mnemonics here.