1. Introduction ccording to the International Classification of Diseases-10 (ICD-10),“pregnancy-related death” refers to a woman’s death during pregnancy or 42 days after childbirth due to many causes, except accidents. The primary subgroup of pregnancy-related deaths is “maternal mortalities.” Maternal mortalities are due to obstetrical causes or underlying health conditions that are complicated or aggravated by pregnancy [1]. ICD-MM (ICD-Maternal Mortality) regards the causes of maternal mortalities and classifies them into direct or indirect types. Direct causes relate to obstetrical issues, and indirect causes refer to underlying diseases or medical conditions that are aggravated during pregnancy, leading to fatal outcomes [2].

Reducing Maternal Mortality Rate (MMR) is a global public health priority; several international programs have focused on this issue [1]. For example, reducing MMR by 75% during 1990-2015 was set as the 5th Millennium Development Goal (MDG). In addition, decreasing MMR to< 70 per 100000 live births in 2030 is targeted as a Sustainable Development Goal (SDG)[3]. The surveillance of maternal mortalities provides evidence on the current magnitude of maternal health and the effectiveness of the ongoing preventive programs;