In the not-so-distant future, same-sex couples may be able to have children that are biologically related to both of them. A recent article in the Journal of Law and the Biosciences outlines a new process known as in vitro gametogenesis, or IVG, through which scientists use stem cells—taken from embryos or adults—to create gametes, the technical name for eggs and sperm, regardless of gender. Scientists have already had partial success with IVG on mice, and were able to create offspring that came from a mixture of one gamete created through this new process and one created naturally.