This video seems relevant: https://www.youtube.com/watch?v=FACK2knC08E

According to Hans Rosling we've reached "peak child", meaning we're almost at 2 children per woman globally. This means population will continue to grow for a few years as globally there are more children than adults but will stabilize after that around the ~11 billion mark. And as long as we stay at that "peak child" number we won't go any further. I really recommend his videos if you haven't seen them.