Can a master sell his slave after having intercourse with her?

As far as I understand, when a concubine gives birth to her master's child, her status would be "mother of the child" (umm al-walad) and she can't be sold anymore. My question: **Can a master sell his slave after having intercourse with her and she doesn't become pregnant?** If yes, what prevents the abuse of having intercourse with a slave and afterwards selling her off to other people and buying new female slaves to have intercourse with them?