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Re: Disappearing twin? From: Wolfgang Moroder, MD (womorode@tin.it) Sat Feb 16 13:48:57 2002 Messages sorted by: [ date ][ thread ][ subject ][ author ] Next message: Wolfgang Moroder, MD: "Re: Vernix Caseosa - at what gestational age is it first seen by" Previous message: E.A.Lyons: "Re: uterine cysts--Dr. Lyons" In reply to: Philippe Jeanty: "Re: Disappearing twin?" Next in thread: James S Smeltzer MD: "Re: Disappearing twin?" Reply: James S Smeltzer MD: "Re: Disappearing twin?" Do you have sort of an actuarial lifetable of twin pregnancies starting from week four when you can diagnose them as two distinct gestational sacs up to 7-8 weeks when you can see monoamniotic twin pregnancies. It would be interesting for counseling patients for the chance they have to "bring home" one or two babies. Best regards Wolfgang Moroder At Fri, 15 Feb 2002, Philippe Jeanty wrote: > >Hum the story is a little different. About 70% of twin do not continue as >twin, with spontaneous loss of one twin. This is the vanishing twin >phenomenon. > >The egg story: I believe you heard that the asymmetrical division of meiosis >that results in the ejection of part of the genetic material (the polar >body) may also be fertilized. This has been considered to be a reason for >acardiac twins. This is somewhat different from what you mentioned. > >-----Original Message----- >From: ultrasound@obgyn.net [mailto:ultrasound@obgyn.net]On Behalf Of >JPeck39@aol.com >Sent: Friday, February 15, 2002 10:49 AM >To: Multiple recipients of list ULTRASOUND >Subject: Disappearing twin? > >I read that about 70% of all pregnancies start out as twins, however only >about 1% of delieveries are live births. > >Also, I read that with each ovulation, the egg divides in two and can be >fertilized by two separate sperms, thus having the babies identical on the >mother's side and fraternal on the father's side or in other words, half >identical. > >Can either of these theories be documented? > >Thank you. > >Joy Peck -- Wolfgang Moroder, MD Prenatal Unit Bolzano General Hospital Italy Next message: Wolfgang Moroder, MD: "Re: Vernix Caseosa - at what gestational age is it first seen by" Previous message: E.A.Lyons: "Re: uterine cysts--Dr. Lyons" In reply to: Philippe Jeanty: "Re: Disappearing twin?" Next in thread: James S Smeltzer MD: "Re: Disappearing twin?" Reply: James S Smeltzer MD: "Re: Disappearing twin?"

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