> Single crease in the palm of the hand > Wide, short hands with short fingers > White spots on the colored part of the eye (Brushfield spots) > delayed mental and social development What kind of medical conditions can be seen in people with Down’s syndrome? > Septal Defects > Cataracts > Dementia > Esophageal and duodenal atresia > Hearing disorders > Hip dislocation > Long-term constipation > Sleep apnea > Hypothyroidism How Is Down Syndrome Diagnosed Prenatally? There are two types of tests for Down syndrome that can be done before a baby is born. They are screening tests and diagnostic tests. The screening tests include blood test and ultrasound (sonogram). There are newly invented prenatal screens which detect chromosomal material from the fetus that is circulating in the maternal blood. Chorionic villus sampling (CVS) and amniocentesis are also very useful diagnostic procedures for diagnosis of Prenatal Down’s syndrome. Most often these tests show accurate results.