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LiveScience
LiveScience
Zoe Cunniffe

In a first, study links maternal genes to risk of pregnancy loss

Pregnancy
An illustration of blue double-helix strands of DNA surrounded by white bubbles against a blue background. The strand in the foreground closest to the viewer has a middle section lit up in golden light. .

A new study is the first to identify genetic variants linked with chromosomal abnormalities that can lead to pregnancy loss.

About half of pregnancy losses in the first trimester are caused by aneuploidy, a condition in which cells have an abnormal number of chromosomes. Studies show that aneuploidy is much more common in egg cells than in sperm cells and that it affects an increasing proportion of a person's eggs with age.

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