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Sybermoms Parenting Forum > SUPPORT-CATEGORY > Multiples! (and we don't mean orgasms) > New Category of Twins > Reply to Thread
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  Topic Review (Newest First)
03-30-2007 03:35 PM
Twinklestars
Quote:
Originally Posted by Diva
no, polar body twins are an egg that splits before fertilization. a seimi-idental twin is an egg that is fertilzed by two sperm then splits.
It is still one egg and two sperm.
03-30-2007 03:34 PM
Twinklestars Polar Body Twins

Most sources emphasize that "polar body" twins are a hypothesis that has not been proven. In essence, polar body twins are "half identical"-- the result of one egg fertilized by two different sperm. The resulting twins share the same genes from the mother but different genes from the father.

In the theory of polar body twinning, a woman ovulates, and as her egg matures, a portion of the egg called the first polar body separates from the egg. Because this polar body contains the same genetic material as the egg itself, theoretically it could be fertilized by a sperm cell (usually, however, the polar body just disintegrates). If both the egg and the polar body are fertilized by separate sperm and two babies develop from this event, polar body twins are formed.

To date, there are no DNA tests available to parents to test their twins to see if they are polar body twins. Many experts believe polar body twinning to be quite rare, if it exists at all. Until science catches up with theory, all we can do is imagine the possibilities.

http://www.bellaonline.com/articles/art32872.asp
03-30-2007 08:05 AM
Dive also, I guess I just don't get excited about these kinds of things. I mean really what does it matter (outside of genetic health issues) what kind of twin your kids are.
03-30-2007 08:01 AM
Dive no, polar body twins are an egg that splits before fertilization. a seimi-idental twin is an egg that is fertilzed by two sperm then splits.
03-29-2007 04:07 PM
Twinklestars They have been talking about this for some time. I have heard them called polar body twins. http://www.google.com/search?client=...utf-8&oe=utf-8

The Olsen twins are an example of them. They are not technically identical.
03-26-2007 04:38 PM
Juni
New Category of Twins
http://news.yahoo.com/s/livescience/...8OoxqkX3gDW7oF

Interesting article at yahoo....though I want more info!

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