Biological explanations of OCD

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Across
  1. 2. Found that people with a first degree relative are 5 times more likely to develop OCD
  2. 4. OCD gets worse at significant times such as pregnancy
  3. 6. Found that there was a cultural difference for Black Americans
  4. 8. Fails to account for other factors
  5. 10. Found that there was no difference in different cultures OCD
Down
  1. 1. Found that is more likely to develop OCD if your MZ twin had it rather than your DZ
  2. 3. Marks and Nesse came with with this
  3. 5. Studies into this are generally family and twins studies
  4. 7. This behaviour is useful for
  5. 9. and Gottesman Found an 87% concordance rate for MZ twins