https://www.selleckchem.com/pr....oducts/taurocholic-a
Nevertheless, 2D4D increased significantly from T3 to T4 in both sexes. Girls, but not boys, who were described as playing more masculine and less feminine had more masculine 2D4D ratios at T1-T4 on both hands (except for right 2D4D at T2 and T3) and had more older brothers and fewer older sisters. These data underline the stability of the sex difference in 2D4D and show the importance of both biological and social influences on sex-typed play behavior.While emerging adulthood (ages 18-25) is marked by incre