In 1979, China introduced the one-chils policy, an extreme form of population control. The policy was part of a birth planning program designed to control the size of its population. Although reasonably successful, it indirectly led to a women shortage in the country. Boys are preferred in culture, and many girls are either aborted or simply exposes to elements of nature. The unbalanced sex ratio is unprecedented in human history.
Fortunately, technology has advanced enough to allow children to be created in exowombs. Sex cells are taken from screened individuals and fertilized, with these children being brought to term in these artificial machines. These children (predominantly girls) are owned and raised by the state, then integrated into the larger community at a certain age. With this, the government can successfully balance out the sexes.
I want this technology to only be used for the purpose that it was intended, and avoid some of the other actions that a rich government would indulge in (growing a new army, genetic experimentation on embryos, etc). What limitations should I introduce to accomplish this?