No thanks to University of Newcastle scientists, us men are about to be no longer necessary when it comes to human reproduction (Boo, science!)
The University of Newcastle team that has achieved the feat is now applying for permission to turn the bone marrow of a woman into sperm which, if successful, would make the method more practical than with embryonic cells.
It raises the possibility of lesbian couples one day having children who share both their genes as sperm created from the bone marrow of one woman could be used to fertilise an egg from her partner.
Link - via Environmental Graffiti, Thanks Rob Knox!