Fallopian tube segments (mnemonic)

Last revised by Daniel J Bell on 24 Apr 2022

A useful mnemonic to remember the order of the five segments of the fallopian tube, from lateral to medial, the direction an ovum would pass following ovulation, is:

  • Four INches Across IS IMpossible

Four inches (10 cm) is the approximate length of the fallopian tube.

​Mnemonic

  • F: fimbriae
  • IN: infundibulum
  • A: ampulla
  • IS: isthmus
  • IM: intramural (interstitial)

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