Abnormal fluid collections on the back of the neck or other places during pregnancy
Abnormal Heart
Abnormal kidneys
Wide neck
Low-set ears
Broad chest with widely spaced nipples
A high, narrow roof of the mouth (palate)
Arms that turn outward at the elbows
Short fingers and toes
Narrow and upward turned fingernails and toenails
Smaller than average height at birth
Slowed growth
Low hairline at the back of the head
Receding or small lower jaw
Swollen hands and feet (in infants)
Obesity
Droopy eyelids
Flat feet
Sexual development problem
Error in the father's sperm or in the mother's egg
Error in the cell division during the early stages of fetal development
Abnormal or missing parts of one of the X chromosomes