Source: Sperm Cells Created From Human Bone MarrowScience Daily wrote:
Human bone marrow has been used to create early-stage sperm cells for the first time, a scientific step forward that will help researchers understand more about how sperm cells are created.
How long before scientists use bone marrow from a woman to create sperm cells? When they can do that will men be 'optional' for giving birth?
FYI, the resulting baby will always be female.