National Geographic Channel - When Brother and Sister are Really Cousins

Printed on August 27, 2007 National Geographic Channel

When Brother and Sister are Really Cousins

August 7, 2009 2:29 PM

In the Womb: Identical Twins is airing this Saturday, August 8th - a fascinating look at twins in the womb through 4D technology and CGI. Pretty amazing stuff and even more amazing are some of the things I was reading from the research department about the show. Here's the ones that most attracted my attention

1. Over 150 identical twins, in the U.S. are married to identical twins. Genetically, their children are brother and sister, but legally their children are cousins.

2. Multiple births are the most common in African-American cultures, they are least common in Asian cultures.
3. The nation with the highest number of multiple births is Nigeria.
4. Twins births have risen 62% since 1980. It is thought this is mostly due to interventional reproductive assistance such as IVF and older age women having children.
5. 22% of twins are left-handed. In the non-twin population, it is just under 10%.

Tags: In the Womb, Twins

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