New Concept of Fetal Station Based on the Trapezoidal Plane (T-Station)

  • Satoru TakedaEmail author


The precise reporting of fetal station is important in the decision-making regarding whether instrumental vaginal delivery or cesarean section should be performed. However, accurate evaluation of DeLee’s fetal station is difficult because it is defined on the basis of a hypothetical vertical midline to the spine, and the findings may vary between individuals. Moreover, during delivery, the fetal head descends anteriorly into the pelvis along the pelvic axis and not in the vertical direction.For this reason, we have clinically used this T-station to evaluate fetal head descent on the basis of the trapezoidal plane at the University of Tokyo Hospital since the 1970s. This concept of evaluating fetal head descent along the pelvic axis might be better than the conventional station system proposed by DeLee.

Supplementary material

Video 1

The relationship between the site of the largest fetal head circumference and t-station.The higher site of the largest fetal head circumference in the frontoanterior position (right) is observed at the same t-station, compared with that in the occipitoanterior position (left).

Video 2

Differences between area and shape of the largest fetal head circumference plane in the occipitoanterior (left) and the frontoanterior position (right).

Video 3

Actual measurement of t-station by vaginal examination.

Video 4

Relation between t-station, the site of the largest fetal head circumference plane, the palpable rage of the posterior surface of symphysis, and the space among the fetal head and the sacrum.


  1. 1.
    Hale RW, editor. Dennen’s forceps deliveries. 4th ed. Washington, DC: ACOG; 2001.Google Scholar
  2. 2.
    Takeda S, Takeda J, Koshiishi T, Makino S, Kinoshita K. Fetal station based on the trapezoidal plane and assessment of head descent during instrumental delivery. Hypertens Res Pregnancy. 2014;2:65–71.CrossRefGoogle Scholar
  3. 3.
    Seki H, Takeda S. A review of prerequisites for vacuum extraction: appropriate position of the fetal head for vacuum extraction from a forceps delivery perspective. Med Clin Rev. 2016;2(2):22. Google Scholar

Copyright information

© Springer Science+Business Media Singapore 2018

Authors and Affiliations

  1. 1.Department of Obstetrics and Gynecology, Faculty of MedicineJuntendo UniversityTokyoJapan

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