Women of reproductive age often experience a variety of unpleasant symptoms prior to the onset of menstruation. While genetics may influence the variability of these symptoms and their severity among women, the exact causes remain unknown. We hypothesized that symptom variability originates from differences in the embryonic environment and thus development caused by variation in exposure to sex...

El objetivo de este estudio fue determinar la variación y asociación del índice digital (2D: 4D) los atletas mano derecha 4DR), izquierda 4DL), el valor medio 4DM) asimetría 4DA) en diferentes disciplinas deportivas. 1178 25 deportivas 29 países se agruparon cuatro categorías deportes: Resistencia (n = 267, 22,7%), Potencia (n= 354, 30,1%), Balón 344, 29,2%) Combate 213, 18,0%). La medición dir...

Circulating adult testosterone levels, digit ratio (length of the second finger relative to the fourth finger), and directional asymmetry in digit ratio are considered sexually dimorphic traits in humans. These have been related to spatial abilities in men and women, and because similar brain structures appear to be involved in both spatial and musical abilities, neuroendocrine function may be ...

Self-efficacy is one’s awareness of being able to cope optimally with different situations. Perceived self-efficacy a belief that closely involves emotional and personological functioning. In fact, when one perceives oneself as capable, the likelihood success increases significantly. The aim this research was verify possible correlation between Digit Ratio (2D:4D), referred prenatal androgen le...

The Geschwind-Behan-Galaburda and sexual differentiation models predict an association between elevated foetal androgen exposure left-handedness whereas the callosal hypothesis predicts opposite. We present a meta-analysis of correlations handedness digit ratio (2D:4D), putative marker prenatal testosterone. Left-handedness predicted low (male-typical) right-hand (R2D:4D), high (female-typical)...