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In page Soviet Union:

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After the revolution, life expectancy for all age groups went up. These improvements continued into the 1960s when statistics indicated that the life expectancy briefly surpassed that of the United States;[citation needed] life expectancy started to decline in the 1970s, possibly because of alcohol abuse.[citation needed] At the same time, infant mortality began to rise. After 1974, the government stopped publishing statistics on the matter. This trend can be partly explained by the number of pregnancies rising drastically in the Asian part of the country where infant mortality was the highest while declining markedly in the more developed European part of the Soviet Union.[4]