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Height is a classic example of a sexually dimorphic trait; on average, men are taller than women in all human populations [ 41 — 43 ]; thus, the large sex difference makes it worth the investigation in relation to the prenatal hormone transfer hypothesis. As a sensitivity analysis, excluding eight cohorts with twins with a ratio below 0. Evaluating the twin testosterone transfer hypothesis: Many previous studies are constrained by several limiting factors, including small sample size, lack of replication, and the inclusion of monozygotic MZ twins in the SS groups, which is questionable due to the variation in placentation patterns between MZ and dizygotic DZ twin pairs [ 5 ]. We recognize the lack of early-life nutritional data as another limitation, and more research is undoubtedly warranted in this field. Extreme outliers and biologically implausible values for height and BMI were inspected visually for each age decade and by sex, resulting in elimination of less than 0. Support for the theory that prenatal exposure to hormones has long-lasting effects on physiology and behavior in later life comes mainly from animal models, in which prenatal androgen exposure has been examined by injecting the developing fetuses with varying doses of testosterone [ 28 — 32 ].

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Height is a classic example of a sexually dimorphic trait; on average, men are taller than women in all human populations [ 41 — 43 ]; thus, the large sex difference makes it worth the investigation in relation to the prenatal hormone transfer hypothesis.

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Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. Derom22, 23 Robert F. Never-breastfed SS twins tended to be shorter and lighter than never-breastfed OS twins, but breastfed SS twins were consistently taller and heavier than breastfed OS twins throughout adolescence and early adulthood [ 46 ]. Share this article via facebook Share this article via twitter Share this article via messenger Share this with Share this article via email Share this article via flipboard Copy link. Sibling configuration and childhood growth in contemporary British families.

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