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Clinical analysis on maternal mortality in N.M.C. was made for the period of 12 years from 1966 through 1977. The results obtained are as follows; 1. 65 maternal deaths including 35 cases of hospital death and 30 cases transferea from outside were encountered among 14978 live births. Maternal mortality rate was 434.0 per 100,000 live births. 2. The leading causes of maternal deaths were toxemia(32.3%), hemorrhage(24.6%), infection(20.1%) and choriocarcinoma(16.9%) in the frequency of order. 3. Maternal mortality showed decreasing tendency down to about 75% in the recent 2 years compared with that of 16 years ago. 4. The leading clinical causes of deaths in toxemia were cardiopulmonary insufficiency, acute renal failure, heart failure and cerebral hemorrhage. 5. The leading clinical causes of deaths in hemorrhage were atonic uterine bleeding and uterine rupture. 6. The leading clinical cause of deaths in infection was septic abortion. 7. The choriocarcinoma indicate the majority of indirect causes of maternal deaths(78.6%) and the rest of causes were cardiac valvular disease(14.3%) and infectious hepatitis(7.1%). 8. All cases of deaths due to hemorrhage did not take the regular antenatal care and all cases of deaths due to toxemia except 2 cases did not, also. 9. 52.4% of maternal deaths due to toxemia occurred in para 0 state and 37.5% of ones due to hemorrhage occurred in para 4 or more state but maternal deaths due to infection showed rather even distribution in Each para state. 10. Most of the maternal deaths were considered to be preventable one(81.5%) in viewing of the medical mismanagement at local clinics in the majority of cases(41.7%) and of delayed admission(43.4%). In order to prevent avoidable maternal deaths on the base of the study, every possible efforts should be emphasized. Particularly, information and education of the patients, high quality antenatal care, early identification of high risk patients, regular service in training of both general practioners and paramedical personne
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