ABSTRACT: This study evaluates the influence of different states of energy balance, positive and negative, on the accumulation and utilisation of energy reserves during the period of gonad development ...

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 ...

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 ...

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 ...

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.

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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 ...

XY pure gonadal dysgenesis has been found in three phenotypic females in three different sibships in the same family. The proposita, a maternal cousin and a maternal aunt are similarly affected. They ...