Left-handed fetuses could show effects of maternal stress on unborn babies
Fetuses are more likely to show left-handed movements in the womb when their mothers are stressed, according to new research. Researchers say their findings are an indicator that maternal stress could have a temporary effect on unborn babies. However, the researchers emphasized that their study was not evidence that maternal stress led to fixed left-handedness in infants after birth. They said that some people might be genetically predisposed to being left-handed and that there are examples where right and left-handedness can switch throughout a person's life.
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