Transvaginal ultrasonographic definition of the central nervous system in the first and early second trimesters

Ilan E. Timor-Tritsch, Ana Monteagudo, Wendy B. Warren

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

A 6.5 MHz transvaginal sector scanner was used to describe the fetal central nervous system anatomy from 6 to 14 weeks. One hundred thirty-three pregnant patients were scanned after the crown-rump measurements were found to be within a range of ≤4 days from menstrual age. The number of possible ultrasonographic sections (“slices”), as well as the number of successful views in the axial, coronal, and sagittal sections, was tabulated. A detailed list of central nervous system structures that are seen at each gestational age is presented. The results showed that a significant number of brain structures could be imaged. The number and the clarity of the structures and the number of successful views in the three scanning planes increased with gestational age. We concluded that transvaginal scanning for central nervous system maldevelopment can be started in the late first and early second trimesters.

Original languageEnglish
Pages (from-to)497-503
Number of pages7
JournalAmerican Journal of Obstetrics and Gynecology
Volume164
Issue number2
DOIs
StatePublished - 1991

Keywords

  • Transvaginal ultrasonography
  • central nervous system
  • fetus
  • first trimester
  • second trimester

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