Psychologists at the University of Vienna have shown that babies born from October to February are more likely to be left-handed. It is believed that there may be hormonal causes in the interrelated background.Specialists included 13,000 adults, 7.5 percent of women and 8.8 percent of men who were left-handed. However, it became clear that, on an average monthly basis, left-handers only 8.2 percent he was born between February and October. However, as of November, this figure rose to 10.5 percent Cortex The results published in the Journal of Cynmы have been confirmed by hormonal experts who believe that the level of testosterone exposure in the uterus influences the likelihood of left-handedness. THE sunlight increases testosterone levelswhereas, overborn children are in the embryonic phase during spring and summer, and therefore more male hormones affect the body.
Among the little boys born over there is more left-handedness"The relative darkness from November to January is probably not directly related to left-handedness. We believe that a clearer period from May to July is the cause of the phenomenon," said Ulrich. The relationship is explained by the male, not by the female, because in the pre-natal period the brain of many more testosterone is out.
Geschwind-Galaburda hypothesized as a dual neurolysis, testosterone demonstrates the development of the left brain in the embryonic stage, whereas the right hand is the dominant one in the right brain.