At what stage does Down syndrome occur?

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Tags

  1. #cases
  2. #occasionally
  3. #syndrome
  4. #caused
  5. #usually
  6. #parent
  7. #sperm
  8. #occurs
  9. #formation
  10. #trisomy
  11. #abnormality
  12. #cells
  13. #event
  14. #inherited
  15. #reproductive
  16. #chromosomal
  17. #during
  18. #condition
  19. #random