Sexual differentiation in humans Sexual differentiation in humans Sexual differentiation in humans is the process of development of sex differences in humans. It is defined as the development of phenotypic structures consequent to the action of hormones produced following gonadal determination. Sexual differentiation includes development of different genitalia and the internal genital tracts, breasts, body hair, and plays a role in gender identification. The development of sexual differences begins with the XY sex-determination system that is present in humans, and complex mechanisms are responsible for the development of the phenotypic differences between male and female humans from an undifferentiated zygote. Females have two X
"What Is This Heart?" "What Is This Heart?" "What Is This Heart?" is the third studio album by How to Dress Well released on June 23, 2014 on Weird World, an imprint of Domino. It is his highest-charting album peaking at number 145 on The Billboard 200. The songs "A Power" and "What You Wanted" were co-written and co-produced by CFCF. Krell described the album's title in a message on Twitter: ""What Is This Heart?"" received mostly positive reviews from contemporary music critics. At Metacritic, which assigns a normalized rating out of 100 to reviews from mainstream critics, the album received an average score