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Results 1 - 3 of 3 for trisomies
  1. Down Syndrome (National Library of Medicine)  
    ... an extra copy of a chromosome is called trisomy. So sometimes Down syndrome is also called trisomy 21. Down syndrome is usually not inherited. It ...
  2. Birth Defects (National Library of Medicine)  
    What are birth defects? A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the ...
  3. Brain Malformations (National Library of Medicine)  
    Most brain malformations begin long before a baby is born. Something damages the developing nervous system or causes it to develop abnormally. Sometimes it's ...