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How common is Down syndrome?

The chance of giving birth to a baby with Down syndrome increases significantly with maternal age. The risk according to the mother's age is as follows: 20 years old = 1 in 1500, 30 years old = 1 in 900, 35 years old = 1 in 350, 40 years old = 1 in 85, 43 years old = 1 in 45, 45 years old = 1 in 30.

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Author: Dr Idan Ben-Barak PhD, MSc, BSc (Med)
First answered: 07 Oct 2014
Last reviewed: 19 May 2018
Rating: 4.8 out of 5
Votes: 1140 (Click smiley face below to rate)
Category: Fetal alcohol syndrome

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