But coming down, I think, the black African countries and the Muslim countries. Still some way to go till they're below reproduction rate (which for poor countries in Africa is 2.3, not 2.2 as in rich countries).
The important point is that the turn downwards has already taken place and can only strengthen from now on. As the Chinese have discovered, once the turn is made, it's almost impossible to reverse it.
Which doesn't mean that the total world population won't reach 9 billion in the meantime ... before it too starts downward late in the century.