Sex differences in the brain are caused by differences in gonadal secretions: higher levels of testosterone during fetal and neonatal life cause the male brain to develop differently than the female ...

In both humans and mammals, sexual development is a long process. In most cases, the genetic sex (XX or XY) results in the development of the corresponding gonadal sex (ovaries or testes), which in ...

Sex chromosomes are chromosomes, or packages of DNA, that are found inside the nucleus of all of your cells. There are two different kinds: X and Y, which determine whether you’re biologically male ...

A team of researchers from the University of Geneva (UNIGE) has been involved in a thorough genetic investigation based on the case of a child suffering from the Nivelon-Nivelon-Mabille Syndrome, a ...

Normally, XY individuals with the DMY gene will differentiate into males and XX individuals (without DMY) will differentiate into females. However, if medaka are bred in water with temperatures of 32 ...

Throughout history people puzzled over what exactly determined a whether a baby would be a boy or a girl. Theories tended to range from the woman’s diet, to the ambient temperature of the room. Until ...