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What Does Your Birthday Say About You? The Seasonal Birth Effect

Key Facts In This Video

  1. If you were born in the summer, research suggests you're more likely to be a smoker or shortsighted. 00:34

  2. Increased exposure to sunlight in women who get pregnant in the summer may raise the likelihood of left-handedness and schizophrenia in their children. 01:22

  3. The seasonal birth effect is only visible when looking at large populations, and no causal links between birth dates and characteristics have yet been found. 02:43