Here's the latest article from the Twins site at BellaOnline.com.

Boy Girl Identical Twins? Highly Unlikely, But Possible
Science has now proven that though opposite sex twins are possible, they are highly rare, and involve genetic abnormalities and birth defects in the female twin.


http://www.bellaonline.com/articles/art1291.asp

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http://forums.bellaonline.com/ubbthreads.php?ubb=postlist&Board=82

I hope to hear from you sometime soon, either in the forum or in response to this email message. I thrive on your feedback!

Have fun passing this message along to family and friends, because we all love our twins!

Kris Bigalk, Twins Editor
http://twins.bellaonline.com

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