What is trisomy 18 and why is it fatal? Trisomy 18 — also known as Edwards syndrome — is a chromosomal condition that is fatal in all but very rare cases, Dr. Silvana Ribaudo, an ob-gyn at ...

She's still sweet — and a little bit sassy — and a rare survivor living with a life-threatening genetic condition known as ...

A century after Down syndrome was first described, scientists discovered that the root cause of this disorder is a condition called trisomy 21. What strides in research have been made since then?

What is the structure of a chromosome? Why does the total number of chromosomes in a cell matter? Learn how chromosomes self-organize within single cells, and how these patterns help us detect ...

Numerical chromosomal abnormalities (aneuploidies) -- the presence of an extra chromosome (trisomy) or a missing chromosome (monosomy) -- result from segregation errors during cell division ...

The recurrence risk with trisomy is 1% to 2% or the maternal age risk, whichever is greater. [2] There is a recurrence risk of 5% to 10% for an affected live-born infant in cases when a parent has ...