Prenatally, girls developing with male co-twins are less likely than girls developing in the uterus alone or with female co-twins to be left-handed. This suggests the influence of

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The Answer of Prenatally, girls developing with male co-twins are less likely than girls developing in the uterus alone or with female co-twins to be left-handed. This suggests the influence of

Prenatally, Girls Developing with Male Co-Twins Are Less Likely Than