In vitro fertilization, or I.V.F., is by now broadly accepted, though it still has objectors, including the Roman Catholic Church. Worldwide, the procedure has produced an estimated six million babies, and is believed to account for 3 percent of all live births in some developed countries. Designer-baby fears have proved in the main to be “overblown,” said Dr. Paula Amato, a professor of obstetrics and gynecology at Oregon Health & Science University in Portland. “We have not seen it with I.V.F. in general,” she told Retro Report. “We have not seen it with P.G.D.”
P.G.D. is shorthand for pre-implantation genetic diagnosis, developed more than two decades ago and an offshoot of in vitro fertilization. Couples with family histories of serious diseases — cystic fibrosis, Tay-Sachs and Down syndrome are among the more common — can have their lab-created embryos tested for the probability of passing the flaws to their offspring.
Technology in effect gives them a measure of control over their genetic fate. An embryo that looks O.K. under a microscope can be implanted in the mother’s uterus for normal development. (Typically, the others are discarded, itself a morally fraught practice for some people).
But what if the issue isn’t averting a dreadful disease? What if would-be parents, rather than leaving the matter to an old-fashioned roll of the genetic dice, resort to embryonic selection to guarantee the child is of a particular sex? It can be done with pre-implantation genetic diagnosis. Dr. Jeffrey Steinberg, director of The
Fertility Institutes in New York, does it as matter of course.
“The technology was out there — it was being applied only to diseases,” Dr. Steinberg told Retro Report. He continued: “I’ve decided to open the door and expand it and say, ‘Listen, this is something that people are interested in, causes no harm, makes people happy. Let’s expand it.’” Though many doctors are strongly skeptical, he also offers P.G.D. to improve the odds that a baby will have a desired eye color, practically casting himself as the Benjamin Moore of the laboratory with his “choice of 30 shades of blue eyes.”
Still other gene-altering techniques are now in play.
Mitochondrial transfer, for one, is intended for a woman whose genetic makeup makes it likely she will bear a child with a severe birth defect. DNA is removed from her egg and implanted in an egg from another woman that contains healthy energy-generating components known as mitochondria. This has given rise to the discomfiting term
“three-parent baby.”