Pregnancy discrimination includes all forms of unfavorable treatment during all phases of the employment process. Expecting mothers expect discrimination: one in five have feared telling a boss about their condition.The Pregnancy Discrimination Act is the only federal law aimed at protecting expecting mothers at work. There are many signs of pregnancy discrimination to watch out for in the workplace. Here are examples of pregnancy discrimination cases that have occurred since the PDA went into effect in 1978. Discrimination against pregnant women remains a prevalent issue in American workplaces. The law says that it is pregnancy discrimination to treat a woman unfavourably because of her pregnancy or pregnancy-related illness. Pregnancy discrimination in the workplace continues to limit women's opportunities and economic advancement. However, under the nationwide Pregnancy Discrimination Act, it is illegal to discriminate against an employee because they are pregnant. The PDA prohibits employers from discriminating against woman in making employment decisions as result of their pregnancy.