Michigan's Civil Rights Act prohibits employment practices that discriminate on the basis of sex, which includes pregnancy, childbirth, or a medical condition related to pregnancy or childbirth (MI Stat. Sec. 37.2202).
The Act covers all employers (MI Stat. Sec. 37.2201
The Act also prohibits employers from treating individuals affected by pregnancy, childbirth, or related medical conditions differently than individuals who are not so affected, but who are similar in their ability or inability to work. The law applies to all employment-related purposes.