Pardon me. The poster did not state which artificial process was employed by himself or by the lesbians.
Artificial insemination simply turns the creative mystical act (of sexual union that was designed to create life naturally) into a mechanical laboratory act for those who insist on ignoring the signs from nature that conceiving their own kids is not their destiny. And, yes, no one is killed by this process.
In vitro Fertilization adds to the synthetic nature of the conception by removing it even further from the natural act and the new life actually begins in a petri dish. And some of this tiny human's siblings are killed off in the IVF process.
When examined thoughtfully, both processes are attempts to ignore the will of the Creator and turn procreation into a mechanical act that invites people outside of the marital union into the sacramental act of creating a child. That is the official Catholic perspective - and a very sound one, too. And just think, if it were not for Artificial Inseminiation, there would be no IVF.
But not everyone believes artifical insemination is wrong. Some couples want children and have difficulty conceiving. I'm not sure what I would do if I were in their shoes.