Which countries allow designer babies?

Thus, Sweden became one of four countries that allow the production of designer babies. The others are Belgium, the United Kingdom, and the United States. In Spain, the first designer baby was born in Tenerife in 2005, although she was produced in the Chicago Reproductive Genetics Unit in 2004.

Explanation:

not the best question format lol but what i think might as scale color is controlled by a single gene with two alleles, the green allele and the yellow allele. when moths that are homozygous for green scales are mated with moths that are homozygous for yellow scales, 100% of the offspring have green scales.