Fallopian tube segments (mnemonic)

Primary
fallopian tube carcinoma: review of MR imaging findings. Thirty-two-year-old female imaged for other purposes. T2WI coronal oblique section through the pelvis showing a normal uterus, both ovaries, and the full length of the left fallopian tube. On the right hand side of the image, an illustration of the fallopian tube anatomy can be observed, based on the MR image see on the left, showing the four segments of the tube: intramural, isthmus, ampulla, and fimbriae
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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)