Down syndrome - Wikipedia, the free encyclopedia
1 Signs and symptoms 1.1 Physical 1.2 Neurological 1.3 Senses 1.4 Heart 1.5 Cancer 1.6 Endocrine 1.7 Gastrointestinal 1.8 Fertility 2 Genetics 2.1 Trisomy 21 2.2 Translocation 3 Mechanism 4 Screening 4.1 Ultrasound 4.2 Blood tests 5 Diagnosis 5.1 Before b...