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Finger-length ratios in female monozygotic twins discordant for sexual orientationLynn S Hall
Department of Psychiatry, School of Medicine, New York University, New York, New York 10016, USA
Arch Sex Behav 32:23-8. 2003..Because MZ twins share virtually the same genes, differences in 2D:4D ratio suggest that low 2D:4D ratio is a result of differences in prenatal environment...
