3 doctors weighed in:

What is down syndrome?

3 doctors weighed in
Dr. James Ferguson
Pediatrics
2 doctors agree

In brief: Chromosome defect

Ds is one of the more common chromosome(c) defects that can survive pregnancy (many others miscarry).
Eggs are supposed to have a single 21c & combine with the 21 from dads normal sperm.Here a pair of moms 21c +dad's 21 creates a baby with the extra 21c in all tissues.This extra material confuses the creation of body parts causing ds..Various prenatal tests can pick up signs early on.

In brief: Chromosome defect

Ds is one of the more common chromosome(c) defects that can survive pregnancy (many others miscarry).
Eggs are supposed to have a single 21c & combine with the 21 from dads normal sperm.Here a pair of moms 21c +dad's 21 creates a baby with the extra 21c in all tissues.This extra material confuses the creation of body parts causing ds..Various prenatal tests can pick up signs early on.
Dr. James Ferguson
Dr. James Ferguson
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