Embryologist Rick Slifkin uses a microscope to view an embryo, visible on a monitor, right, at Reproductive Medicine Associates of New York, in New York, Thursday, Oct. 3, 2013. Fertility clinics have put a new twist on how to make babies: A "two-mom" approach that lets female same-sex couples share the biological role. One woman's eggs are mixed in a lab dish with donor sperm, then implanted in the other woman who carries the pregnancy. (AP Photo/Richard Drew)BOSTON (AP) — Fertility clinics have put a new twist on the right way to make infants: A "two-mom" method that lets feminine similar-sex couples share the organic function. One woman's eggs are jumbled in a lab dish with donor sperm, then implanted within the different woman, who consists of the pregnancy.