The idea that more girls are born during times of stress is a popular belief, but there's no scientific evidence to support it.
While some studies have explored the relationship between environmental stress and sex ratios at birth, the results are inconclusive.
It's important to note that sex determination in humans is primarily influenced by genetics, with the father's sperm carrying either an X or a Y chromosome.
The sex of a child is determined at conception, long before any environmental factors, including stress, could potentially play a role.
While the sex ratio at birth can fluctuate slightly due to factors like maternal age, health, and environmental conditions, these fluctuations are generally small and don't consistently favor one sex over the other.
Therefore, the belief that more girls are born during times of stress is a misconception and not supported by scientific research.
