Intrauterine ultrasonographic assessments of embryonic development

American Journal of Obstetrics and Gynecology
R FujiwakiM Kitao

Abstract

Our purpose was to describe embryonal anatomic structures by use of intrauterine ultrasonography with a 20 MHz flexible catheter-based, high-resolution, real-time miniature transducer. Thirty-four women about to undergo therapeutic abortion from 7 to 9.9 weeks' gestation were studied with specially developed catheter-based, high-resolution, real-time miniature (2.4 mm outer diameter) ultrasonography transducer (20 MHz). A percentage of anatomic structures visualized at each gestational age is presented. The number and the clarity of structures increased from 7 to 8 weeks of gestation; however, the image quality was degraded because of the increasing fetal size at 9 weeks. At 8 weeks secondary brain vesicles, spine, midgut herniation, liver, upper and lower limb buds, and sacral tail were visualized in all fetuses. The four-chamber view was first identified at 8 weeks, as were fingers or toes. The stomach was first noted at 9 weeks. The umbilical cord cyst was visualized in 8% of embryos at 7 weeks' gestation and in 29% of embryos at 8 weeks. One cystic hygroma was diagnosed at 8 weeks 5 days. Intrauterine ultrasonography provides information on the visualization of anatomic structures of the embryo. In this limited series one e...Continue Reading

References

Mar 1, 1992·Radiology·L K SkiboC S Levi
Sep 1, 1991·American Journal of Obstetrics and Gynecology·L A Dolkart, F T Reimers
Feb 1, 1991·American Journal of Obstetrics and Gynecology·I E Timor-TritschW B Warren
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Mar 1, 1993·American Journal of Obstetrics and Gynecology·R A QuinteroJ C Hobbins

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Citations

May 8, 2001·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·R Chaoui
Jun 2, 2009·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·H Tanaka, T Hata
Jun 1, 2000·Human Reproduction·H TanakaT Hata

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