What about the people who will have access to these treatments and those who won't? It looks like very similar to the birth of a new kind of aristocraty.
Before growing our life time, we should improve our education for a better birth-control: what would happen if we start to live for hundred of years and that new humans keeps arriving?
This is the subject of a good short story by Kurt Vonnegut, titled: 2BR02B (read letter by letter, read 0 as 'naught')