Moreover, although the rate ratio increased until cohorts born in the 1970s, it showed a decreasing trend thereafter.
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An Analysis of the Trend of Fetal Mortality Rates among Working and Jobless Households in Japan, 1995-2019.
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The sentences
Although the spontaneous fetal mortality rate ratio showed a decreasing trend during the analyzed period, it showed an increasing trend from cohorts born in the late 1940s to the 1970s. 4.