Maternal Mortality Ratio (MMR):

• number of maternal deaths in a period per number live births during same period

(LTR: lifetime risk; TFR: total fertility rate)

Maternal Mortality Rate (MMRate):

• number of maternal deaths in a period per number of women of reproductive age during same period

Lifetime Risk (LTR):

• probability of a woman dying from maternal causes over course of her reproductive life span
• Sometimes approximated as 35 x MMRate

Proportion Maternal Among Deaths of Women of Reproductive Age (PMDF):

• reflects contribution of maternal deaths to overall mortality among women of reproductive age

Case Fatality Rate:

• reflects the number of women who die from a specific complication among all pregnant or recently delivered women who experience that complication