Maternal mortality ratio
The number of maternal deaths directly or indirectly related to pregnancy per
100,000 live births in a given time period.
According to the ICD 9 " A maternal death is defined as the death of a woman
while pregnant or within 42 days of the termination of pregnancy, irrespective
of the duration and the site of the pregnancy, from any cause related to or
aggravated by the pregnancy or its management but not from accidental or
Maternal deaths are further subdivided into two groups
Direct obstetric deaths: those resulting from obstetric complications of the
pregnant state (pregnancy, labor and puerperium); from interventions, omissions
or incorrect treatment; or from a chain of events resulting from any of the
Indirect obstetric deaths: those resulting from previous existing disease or
disease that developed during pregnancy and that were not due to direct
obstetric causes but were aggravated by the physiologic effects of pregnancy.
Some include both liveborn and stillborn infants in the denominator for