Since the ratio of the second-to-fourth finger length was first proposed as a marker for
prenatal androgen action in 1998, over 100 studies have been published that have either …

Sex differences in brain and behavior of animals including humans result from an interaction
between biological and environmental influences. This is also true for the differences …

We used self-reported direct finger measurements from 255,116 participants in a BBC
Internet survey to investigate the measurement of 2D: 4D ratios and their association with …

The ratio of the length of the second and fourth digits (2D: 4D), a putative proxy of prenatal
testosterone (PT), is correlated with measures of physical fitness. The relationship between …

In humans, the relationship between the prenatal testosterone exposure and the ratio of the
second and the fourth digits (2D: 4D) has been extensively studied. Surprisingly, data on this …

A scientometric analysis of modern research on the second-to-fourth digit ratio (2D: 4D), a
widely studied putative marker for prenatal androgen action, is presented. In early 2009, this …

Digit length ratios, especially the second-to-fourth digit ratio (2D: 4D), are associated with
various pathological and behavioural conditions in many species including humans and are …

This paper presents results of a study designed to: 1) test for a sex difference in the relative
lengths of the finger bones, including the second-to-fourth digit ratio (2D: 4D), using left …

In the last few years, several studies have questioned the value of the second-to-fourth digit
ratio (2D: 4D) as a measure of exposure to sex hormones before birth. Controversy has also …

The number of sexual partners per individual (NSP) is an important component of sexual
behaviour. Here, we report two studies concerning the relationship between a probable …