Unless you meant something else, that was me adding another study they said can contribute. I didn't go "too far".

If you're going to post excerpts from the research, please put in the headings to make it easier for people to categorise and find information and helps put each aspect of the research in context for the reader.

Material and methods

(a) Participants Umbilical cord blood was obtained at the birth of 861 singleton deliveries (selected randomly). The participants in this study were the 97 Caucasian males and 86 Caucasian females who volunteered to have their faces photographed in early adulthood (age range: 21–24 years). There was no statistically significant difference in age at the time of facial photography between males (M = 22.81 years, s.d. = 0.61) and females (M = 22.91, s.d. = 0.60; t181 = 1.04, p = 0.31).

Discussion

The current findings present a unique contribution to the large body of literature that has linked behavioural characteristics with facial phenotypes. A more masculinized face structure has been associated with aggression [48], risk-taking behaviour [49,50] and dominance [51]. These relationships are in the same directions as the links between prenatal testosterone exposure and these same behavioural characteristics [24], raising the possibility that testosterone underpins both sets of relationships. Exposure to increased levels of prenatal testosterone has also been linked with several neurodevelopmental disorders, in particular autism spectrum disorder (ASD) [52] and developmental language disorder [26]. While these conditions have not traditionally been thought to be characterized by a specific facial phenotype, the current findings would predict a more masculinized facial structure among affected individuals.

In summary, using umbilical cord blood and 3D facial photography, we report the findings from a 20-year study, revealing a significant relationship between exposure to increasing levels of prenatal testosterone and masculinization of the adult face in both males and females. The current findings provide the first direct evidence for a long-hypothesized link between early testosterone exposure and face structure, and provide further support for the organizational effects of the prenatal hormone environment on postnatal development of the human body.

Note: I would like to include the section number, but Saidit numbering system overrides the numbers, so I'm excluding them from the heading.