Symptoms of Trisomy 13

Cleft lip or palate, clenched hands (with outer fingers on top of inner), decreased muscle tone, extra fingers or toes, hernias, scalp defects, single palmar crease, small eyes, small lower jaw, close-set eyes, low-set ears, hole split or cleft in iris, mental retardation, seizures, limb abnormalities, small head, and undescended testicle.