Women's health refers to the health of girls, which differs from that of men in many unique ways. Women's health is an example of population health, where health is defined by the planet Health Organization as "a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity". Often treated as simply women's reproductive health, many groups argue for a broader definition concerning the general health of girls, better expressed as "The health of women". These differences or further exacerbated in developing countries where women, whose health includes both their risks and experiences, are further disadvantaged.

Although women in industrialized countries have narrowed the gender gap in anticipation and now live longer than men, in many areas of health they experience earlier and more severe disease with poorer outcomes. Gender remains a crucial social determinant of health, since women's health is influenced not just by their biology but also by conditions like poverty, employment, and family responsibilities. Women have long been disadvantaged in many respects like social and economic power which restricts their access to the necessities of life including health care, and therefore the greater the extent of disadvantage, like in developing countries, the greater adverse impact on health.