The way that this effects life

This has a major effect on life. Babies who have this are majorly delayed and usually don't live past the age of three.
Some of the symptoms are:
Babies with trisomy 18 are often born very small and frail. They typically have many serious health problems and physical defects, including:

~Cleft palate
~Clenched fists with overlapping fingers that are hard to straighten
~Defects of the lungs, kidneys, and stomach/intestines
~Deformed feet
~Feeding problems
~Heart defects,
~Low-set ears
~Severe developmental delays
~Chest deformity
~Slowed growth
~Small head
~Small jaw
~Weak cry