For years now, aspiring parents have been designing their children. Screening embryos for disease-causing genes during IVF, selecting their future baby’s sex, picking egg and sperm donors to influence their child’s traits. Today, a lot of those “designer babies” are full-on kids or teenagers. And some families are discovering that, as hard as you try, things don’t always work out as planned: The kids feel like walking science experiments; the parents are disappointed in how their progeny turned out. Fertility businesses are selling a better chance of domestic bliss, and these families feel cheated.
Now controversial new technologies promise parents even more control over their embryos. One US startup, called
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