Archived from the original on 6 January A carrier mother may have normal offspring, but she is at risk of having more children with Down syndrome. Action T4 in Nazi Germany made public policy of a program of systematic involuntary euthanization. There are contradictory reports on the effect of cigarette smoking and consumption of alcohol on the occurrence of chromosomal aneuploidy. Cells The human body is made up of cells. Genetic counselling should always be available to families with a child with Down's syndrome. New cells are made by one existing cell dividing into two.
It is believed that the chance is lower than it would be if the child had regular trisomy
The Genetics of Down's Syndrome
McKinlay Gardner, Grant R. How does regular trisomy 21 occur? Delayed physical growthcharacteristic facial featuresmild to moderate intellectual disability . This page was last modified at 4 May Retrieved 25 August