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There was a correlation between left-handedness and a Finnish, Dutch and Japanese research group on low birth weight, and it was also found that left-handed children develop slower motor skills.There has been a correlation between left-handedness and low birth weightEarlier studies have suggested a link between left-handedness and low birth weight. And other tests have shown that right or left handedness is decided before birth: ultrasound examines fetuses as early as 10 weeks of age to see which "thumbs up" - MTI said, according to medicalxpress.com. kapcsolatrуl. Professionals analyzed two birth databases in Uri, one from the Netherlands and one from Japan. Because previous research has shown that left-handedness is more common in twins and even more in triple twins, researchers have focused solely on the latter. Databases were reduced to thirteen twins born at 33 weeks: in the Netherlands, this represented 947 twins, and in Japan, 1305 triplets. they came to the world. In Japan, similar results were obtained: the birth weight of left-handed children was 1.599 kilograms, and that of right-handed children was 1.727 kilograms. The researchers also found that left-handed children developed slower motor skillsHowever, the researchers emphasize that their results do not mean that low birth weight is the only cause of left-handedness. Earlier studies have shown that heredity also plays a role, since left-handed people are more likely to have a left-handed child.
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