Re: Two Yolk Sacs, one embryo
From: Wolfgang Moroder, MD (womorode@tin.it)
Mon Jan 27 05:12:40 2003
I was never happy with the term double bleb sign - as far as I remember
forged by a radiologist in the eighties. I was never able to reproduce
it even now that I hav a nice vaginal probe (10MHz). I have observed a
disproportion between the early embryonic size and the amniotic sac
diameter ONLY in cases of early embryonic failure.
We all wait for Marco Libardi telling us the end of the story.
Wolfgang
At Sun, 26 Jan 2003, Terry J DuBose wrote:
>
>The "double bleb" seems to have a fairly short period of time. It would
>be interesting to know when the diameters of the yolk sac and amnion are
>identical, and the rate of change of the two.
>
>Looking through the web sites, Dr. Libardi’s image is the best of
>examples I have found.
>
>This web site states
>http://www.ohsu.edu/ps-DiagRadiol/kojima/nliup.htm
>• Double bleb sign-smaller amniotic sac, yolk sac, and prochordal plate
>seen between. Seen at 4-5 wks.
>
>There were 5 hits on a Google search:
>
>Bombay Hospital Journal - Original Research Article - YOLK SAC ...
>... Fig 2 : Yolk sac with embryo and amniotic sac complex. Double bleb
>appearance .Transnational
>scan at 7 menstrual weeks shows a well defined yolk sac and embryo. ...
>http://www.bhj.org/journal/oct97/original_01.htm - 74k - Cached - Similar pages
>US Normal IUP
>... 31 + " days. Double bleb sign-smaller amniotic sac, yolk sac, and
>prochordal plate seen between. Seen at 4-5 wks. Double decidual ...
>http://www.ohsu.edu/ps-DiagRadiol/kojima/nliup.htm - 10k - Cached - Similar
>pages
>Ecografia Primer Trimestre - [ Translate this page ]
>... Yeh HC, Rabinowitz JG. Amniotic sac development : Ultrasound
>features
>of early pregnancy-the double bleb sign. Radiology 1988 ;166:197. ...
>http://www.tocogineconet.com.ar/revisiones/ ecografia1trimestre.htm - 39k -
>Cached - Similar pages
>[PDF]The first trimester
>File Format: PDF/Adobe Acrobat
>... This pro- duces the `double bleb' sign that is regularly described
>in texts as occurring
>at about 5.5 weeks, menstrual age, but which is rarely seen because it
>...
>http://www.harcourt-international.com/meire/Vol3Chap7.pdf - Similar pages
>Sonoembryologie
>... 18. Yeh, H., Rabinowitz, J.: Amniotic sac development : ultrasound
>features
>of early pregnancy-the double bleb sign.Radiologi 166, 1988, s. 97. 19.
>...
>http://www.levret.cz/vol/fulltext/sonoemb/sonoembryologie.htm - 46k - Cached -
>Similar pages
>
>Embryosonography is very interesting to me, and isn’t this fun?
>
>--
>Peace, Terry J DuBose, M.S., RDMS, FAIUM, FSDMS
>Chair, Ultrasound @OBGYN.net
>Diagnostic Medical Sonography Program
>Univ. Arkansas for Medical Sciences
>Little Rock, Arkansas USA
>
--
Wolfgang Moroder, MD
Prenatal Unit
Bolzano General Hospital Italy
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