Don't expect to see a baby bump on Scarlett Johansson anytime soon. She told Entertainment Tonight that she has lots of time to have babies. She said that she loves her work and that she is enjoying herself too much right now.
She will be a mother someday, but definitely in the future. She wants to be able to enjoy that part of her life, when the time is right. It's not that time right now though.
Ah yes, there is plenty of time. You can have kids anytime, enjoy Ryan and your time together for a little while.
Source