Depiction of an early stage embryo. nobeastsofierce Science / Alamy Stock Photo In human embryos, testes in males and ovaries in females begin to develop at around four weeks, with sex determination ...

The gonad arises as a bipotential organ primordium. Expression of the Y-linked gene, Sry, in the bipotential gonad leads to the differentiation of Sertoli cells, which orchestrate testis development.

In mammals, sex differentiation relies on the establishment of chromosomal, or genetic, sex at fertilization, with subsequent differentiation of the gonad according to the genetic sex and ...

Early in fetal development, a mass of cells known as the bipotential gonad has the possibility of giving rise either to ovaries or testes, reproductive organs that contribute to many of the ...

A new model of tiny human ovary organoids, or ovaroids, has been developed from stem cells, according to research presented at the first Joint Congress between the European Society of Paediatric ...

In a new study published in Water Biology and Security, scientists from the Ocean University of China have constructed the first detailed cell map of the gonad in the hermaphroditic bay scallop ...

It was that last word, gonads—and a researcher who referred to them as “magical organs”—that sent Radiolab producer and host Molly Webster on a quest to reignite our fascination with embryonic ...

Panel A shows the internal structures of a 46,XY patient with pure gonadal dysgenesis. There are bilateral streak gonads with retained müllerian structures, fallopian tubes, and a midline uterus.

Jenny Graves has received funding from ARC and NHMRC. Some babies are born with a genetic variant that leads to atypical sexual development. It can result in the child being neither a typical boy nor ...

Early in human development, during the first trimester of gestation, a fetus may have XX or XY chromosomes that indicate its sex. Yet at this stage a mass of cells known as the bipotential gonad that ...