Prenatal testosterone linked to long-term effects in females with male twin

In the largest and most rigorous study of its kind, Northwestern University and Norwegian School of Economics researchers examined data on all twin births in Norway over a 12-year period to find that females exposed in utero to a male twin experienced adverse educational and labor outcomes along with altered patterns of marriage and fertility as adults. “This is the first study to track people for more than 30 years, from birth through schooling and adulthood, to show that being exposed in utero to a male twin influences important outcomes in their twin sister, including school graduation, wages and fertility rates.” The study, “Evidence that prenatal testosterone transfer from male twins reduces the fertility and socioeconomic success of their female co-twins,” will be published the week of March 18 in the Proceedings of the National Academy of Sciences (PNAS).

Source: phys.org