You birth month can tell you a lot about your personality, your future life and your future health as well. When you were born could play a fascinating role in everything from your risk of melanoma to food allergies, science suggests.
The impact of birth season is far from definitive; heredity and environment play a far bigger role.
Better physical fitness: A study in the International Journal of Sports Medicine found that school-age boys born in November scored an average of ten percentile points higher on tests of cardiorespiratory fitness, handgrip strength, and lower-body power compared with those born in April.
Food allergies: People with autumn birthdays were 30 to 90 percent more likely to develop food allergies than those born in other seasons. Fall babies are exposed to less skin-protecting vitamin D early in life, which could make them more likely to develop a sensitivity to food allergens through the skin.
Left-handedness: Men born during this season are more likely to be lefties than those born during other times of the year. High levels of testosterone in utero can make left-handedness more likely.
Premature birth: Babies conceived in May (and typically born in February) are 10 percent more likely to arrive prematurely than those conceived during other seasons.
Melanoma: Spring-born people have a 21 percent greater chance of developing melanoma than those born in the fall. Exposure to UV light during the first few months of life may affect the body’s susceptibility to developing melanoma as an adult.
Nearsightedness: Summer babies are more prone to need glasses for distance, found a study in the journal Ophthalmology. This may be because of the amount of light babies are exposed to right before and after they’re born.
Mood swings: People born during summer months are more likely to have “cyclothermic temperament,” or rapid fluctuation between sad and happy moods. Light and temperature exposure may affect brain chemicals that regulate mental health.