Yes, I did and I knew that we would not be able to afford another child. DH had 2 children when we married and I firmly believed "first in time, first in line". I did not want to take away anything from his two existing children in order to bring another into this world.
Every once in a while, I have a twinge of regret, but 99% of the time, I do not regret this decision made 30+ years ago.