Mice have been born from eggs derived from male cells

Seven mice have been born using a process that involves turning male cells into egg cells and then fertilising them with sperm. The technique could one day allow men in same-sex couple to have children – with the help of a surrogate mother – who are genetically related to both of them. It could also help women with certain chromosomal conditions to have children that are biologically related to them.

The original aim of the research was to investigate options for treating infertility in women who have …