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This descriptive study was based on the maternal death registration system established by the Japan Association of Obstetricians and Gynecologists and the Maternal Death Exploratory Committee (JMDEC). 361 women died during pregnancy or within 42 days after delivery between January 2010 and June 2017 throughout Japan were analysed, in order to investigate the trend in maternal deaths related to obstetric medical practice. Reports of maternal death were consistent, ranging from 45 cases in 2010 to 44 cases in 2017. Among all maternal deaths, the frequency of deaths due to obstetric haemorrhage ranged from 29% (2010) to 7% (2017) (p < 0.001). The causes of obstetric haemorrhage have progressively reduced, especially maternal deaths due to uterine inversion and laceration have not occurred since 2014. The remaining causes of obstetric haemorrhage-related maternal deaths were placenta accreta spectrum, placental abruption, and severe forms of uterine focused amniotic fluid embolism. We believe the activities of the JMDEC including annual recommendations and simulation programs are improving the medical practices of obstetric care providers in Japan, resulting in a reduction of maternal deaths due to obstetric haemorrhage.

Decline in maternal death due to obstetric haemorrhage between 2010 and 2017 in Japan