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Re: Two Yolk Sacs, one embryoFrom: Philippe Jeanty. MD, PhD (jeanty@TheFetus.net)Mon Jan 27 06:45:52 2003
If if remember well the double bleb sign of Dr. Yeh was discussed at one SRU meeting on day, and we came to the conclusion that the sign could not represent the early amnion and primitive yolk sac because when these are present the embryo was too small to been seen by US. So certainly not the size seen in the pictures that were circulated. -----Original Message----- From: ultrasound@obgyn.net [mailto:ultrasound@obgyn.net] On Behalf Of Terry J DuBose Sent: Monday, January 27, 2003 7:41 AM To: Multiple recipients of list ULTRASOUND Subject: Re: Two Yolk Sacs, one embryo I agree, that we do not see the "double bleb" very often. That is why I assumed it only exists for a short period of time, few days, before the amnion becomes large enough to be recognizable as the amnion. I will see if I can find some information about the relationship of the amnion and yolk. But if the yolk sac develops first, it is logical that at some point the amnion and yolk will be the same size for a brief period before the amnion becomes larger... why we don't see it more often is the question. I do remember seeing the double-bleb a few times in the early 90's. Hopefully, as more and more get better machines we will get better examples... and an understanding of the process. I don't know why I didn't think about it when we first saw Dr. Libardi's image... synapse failure is my only excuse. The follow-up on this case will be interesting. Peace, Terry J DuBose
On Mon, 27 Jan 2003 06:14:31 -0600 womorode@tin.it (Wolfgang Moroder, MD)
writes:
> I was never happy with the term double bleb sign - as far as I
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