CHICAGO --- The sex of newborns is dictated by the X and Y chromosomes – girls are XX whereas boys are XY. However, new research from Northwestern University has shown that normal testis formation ...
DALLAS – Nov. 20, 2003 – Researchers at UT Southwestern Medical Center at Dallas have shown that insulin family signaling is important for male sex determination, a discovery that furthers the ...
A study reports that a single nucleotide variant in the genome can make an XY individual develop as female and an XX individual develop as male. A tiny DNA change in a non-coding regulatory region can ...
Researchers have identified a cause of testicular tissue developing in people with female chromosomes. Researchers at the Francis Crick Institute, the Institut Pasteur and their clinical collaborators ...
Polyorchidism is a rare condition that causes males to be born with more than two testicles. Usually, the condition involves three testicles. People with polyorchidism are born with more than two ...