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Showing posts from December 24, 2015

US Twin Birthrate Hits All-Time High

The country's twin birthrate hit 33.9 twins per 1,000 births in 2014, up from 33.7 twins per 1,000 births in 2013, according to the report from the Centers for Disease Control and Prevention. The "twinning rate" has nearly doubled since 1980, when the rate was 18.9 twins per 1,000 births, the researchers wrote in their report, published today (Dec. 23) by the CDC's National Center for Health Statistics. However, the birthrates of triplets and higher-order births declined in 2014, from 119.5 per 100,000 in 2013 to 113.5 per 100,000 in 2014 — the lowest rate in 20 years and down more than 40 percent from the peak in 1998, when the birth rate of triplets and higher-order births reached a record 193.5 per 100,000, according to the report.

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Stem Cells May Save Northern White Rhinos

At a meeting in Vienna from Dec. 3 to Dec. 6, researchers developed a plan to use stem cells to create fertilized rhino embryos, which will be carried by surrogate southern white rhino females. This past year has been a sad one for northern white rhinos, a rapidly disappearing subspecies destroyed by habitat loss and poaching. An infection claimed Nola, a 41-year-old female at the San Diego Zoo, in November.


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