In trisomy, there is an extra chromosome.
The risk of having a child with an aneuploidy increases as a woman ages.
Multifactorial disorders are caused by a combination of factors.
A common trisomy is trisomy 21 Down syndrome.
Chorionic Villus Sampling:
A genetic disorder caused by a change in a gene or genes that are located on the sex chromosomes.
A chromosomal disorder that causes severe intellectual disability and serious physical problems such as a small head, heart defects, and deafness.
A disorder caused by a mutation on the X chromosome.
A genetic counselor has special training in genetics.
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Other trisomies include trisomy 13 Patau syndrome and trisomy 18 Edwards syndrome.