On the one hand, lesbian couples have the chance to have a child through lesbian IVF or intra-partner egg sharing. It is a way for both of them to participate in the process actively, as one becomes the biological mother and the other the birth mother.
Intrauterine insemination (IUI) with donor sperm is another option available for lesbian couples. However, it depends on the chances for conception this treatment may bring to the couple, so fertility tests will be performed prior to choosing between one option or another.
On the other hand, gay men can build their family thanks to surrogacy with donor eggs. In this case, a gestational carrier undergoes IVF with the eggs of another woman, who acts as the egg donor for the intended parents, while one of them delivers the semen sample. Thus, the child will be genetically linked to one of the parents.