What is a significant outcome for those with Trisomy 18?

Trisomy 18, also known as Edwards syndrome, is a genetic disorder caused by the presence of an extra 18th chromosome. The significant outcome associated with this condition is that a high percentage of affected individuals do not survive to term and are often not viable outside the womb. Studies indicate that around 95% of babies diagnosed with Trisomy 18 do not survive in utero. Those who are born may face severe health challenges and often do not survive past their first year, which underscores the profoundly serious nature of this condition.

The other options do not align with the established outcomes associated with Trisomy 18. Affected individuals do not typically have normal lifespans, nor do they consistently grow taller than average; rather, many face growth restrictions and other developmental issues. While some individuals may display varying degrees of cognitive abilities, severe mental impairment is more prevalent rather than being the standard for everyone with this condition.