This would be difficult to do a widespread basis.
The rich will jump on it.
And create a super-rich super-race.
They will be smarter, stronger, healthier and even better looking and only keep amongst themselves.
The rest will be an underclass, and eventually be like a different race unless it was made widely accessible which in itself would cause other problems.
Already, the gap between the rich and poor is the highest it's been in human history, a nationless group of plutocrats who can live wherever they wish. With this, alertering of their babies genetics, it will put them at a new level.