Specialists have discovered a curious occurrence - kids often share their birthday months with their mothers.
Many people share the same birth month as their mothers, as revealed by a study of millions of families.
This occurrence is more common than expected, with siblings and fathers also tending to share the same month of birth.
How It Was Discovered
Researchers looked at 12 years of data from Spain and France, covering 10 million births, and found that parents often share the same birth month more than expected.
Previous studies hinted that a woman's birth season might influence when her children are born, but this research is the first to show that women are more likely to have kids in the same month they were born.
This pattern likely happens because family members tend to have similar social and economic backgrounds, leading to similar birth trends in different generations.
The higher number of kids born to parents with the same birth month could be because of social or behavioral reasons that influence who people choose as partners.
Biological factors affecting when babies are born, like exposure to sunlight and food availability, also depend on a person's social and economic background.
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