Maternal death or maternal mortality is defined in slightly different ways by several different health organizations. The World Health Organization (WHO) defines maternal death as the death of a pregnant mother due to complications related to pregnancy, underlying conditions worsened by the pregnancy or management of these conditions. This can occur either while she is pregnant or within six weeks of resolution of the pregnancy. The CDC definition of pregnancy-related deaths extends the period of consideration to include one year from the resolution of the pregnancy. Pregnancy associated death, as defined by the American College of Obstetricians and Gynecologists (ACOG), are all deaths occurring within one year of a pregnancy resolution. Identification of pregnancy associated deaths is important for deciding whether or not the pregnancy was a direct or indirect contributing cause of the death.
There are two main measures used when talking about the rates of maternal mortality in a community or country. These are the maternal mortality ratio and maternal mortality rate, both abbreviated as "MMR". By 2017, the world maternal mortality rate had declined 44% since 1990; however, every day 808 women die from pregnancy or childbirth related causes. According to the United Nations Population Fund (UNFPA) 2017 report, about every 2 minutes a woman dies because of complications due to child birth or pregnancy. For every woman who dies, there are about 20 to 30 women who experience injury, infection, or other birth or pregnancy related complication.