How could anyone in this circumstance have proof? Not many employers are going to come right out and say it in front of a witness. The only evidence I even have is that I was a very good waitress, which I have witnesses to, that he fired me as soon as he had someone to replace me (who was a man, no less), that he told me to go get an abortion when I first told him that I was pregnant, and that he told me I was useless to him now that I was pregnant.