Different definitions of maternal mortality are used to track and analyze deaths by different organizations. Most broadly, maternal mortality is the death of a person while pregnant or within one year of the end of a pregnancy.
A pregnancy-associated death is the death of a person within one year of the end of a pregnancy from any cause. Pregnancy-associated deaths represent the broadest category of maternal deaths, and can be broken down further into two main categories: pregnancy-related deaths and deaths unrelated to pregnancy.
A pregnancy-related death is a maternal death due to a pregnancy complication. More specifically, these deaths occur during pregnancy or within a year of the end of a pregnancy and are due to a chain of events initiated by the pregnancy or the aggravation of an unrelated condition by the physiologic effects of pregnancy.