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Health

Finger-prick test reveals fetus's sex in the first trimester

By Alice Klein

23 April 2018

Âé¶¹´«Ã½. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

​Boy or girl?​

LEA PATERSON/SCIENCE PHOTO LIBRARY

Boy or girl? Pregnant women can now find out the sex of their fetus with a simple finger-prick test.

Until recently, expectant ​mothers usually had to wait until a mid-pregnancy ultrasound to find out their future child’s sex.

But in the last few years, increasing numbers of people have been finding out from a first-trimester blood test – called the  – that also detects Down’s Syndrome.

The test works by analysing fragments of the fetus’s DNA that have leaked into the mother’s bloodstream. It involves collecting…

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