Women's health refers to health issues specific to human female anatomy. These often relate to structures such as female genitalia and breasts or to conditions caused by hormones specific to, or most notable in, females. Women's health issues include menstruation, contraception, maternal health, child birth, menopause and breast cancer. They can also include medical situations in which women face problems not directly related to their biology, for example gender-differentiated access to medical treatment. Women's health is an issue which has been taken up by many feminists, especially where reproductive health is concerned. Women's health is positioned within a wider body of knowledge cited by, amongst others, the World Health Organisation, which places importance on gender as a social determinant of health.