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 ...

For the first time, an international research team led by Chinese scientists has created embryos that are part human and part monkey, sparking hopes of someday growing human organs for transplants, ...

Little pigs with big genome edits could be the future of organ donation. A monkey that received a kidney from a genetically engineered miniature pig lived for more than two years after the transplant, ...

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 ...