Got to admit, I thought this was about eugenics and culture.
In vitro fertilization (IVF) accounts for up to five percent of babies born in developed countries, and the technique has yielded some five million people ever since Louise Brown was born in the UK on July 25, 1978. And that’s just humans; the technology has been a huge boon in breeding farm animals. Yet there are hints that the procedure can have some unwanted effects on the resultant embryos. One such indication is a skewed sex ratio.
Looks like the fix is just a change in culture medium. It will take some time for this to become mainstream for human IVF. It also looks like (from the abstract) that this extra bath doesn’t harm male embryos in any way, so it won’t require genetic testing of embryos to sort out the girls (extra $$$ and mandatory freeze).
The best part is that this fix will likely increase overall success rates as those female embryos that would have failed instead thrive. Even a small % increase in success means so much to people desperately trying for a child, regardless of gender.