The women's health movement (WHM, also feminist women's health movement) in the United States refers to the aspect of the American feminist movement that works to improve all aspects of women's healthcare. It began during the second wave of feminism as a sub-movement of the women's liberation movement. WHM activism involves increasing women's knowledge and control of their own bodies on a variety of subjects, such as fertility control and home remedies, as well as challenging traditional doctor-patient relationships, the medicalization of childbirth, misogyny in the health care system, and ensuring drug safety.