Secular variation and risk factors of preterm birth in Hainan, the Free Trade Port in China from 2010 to 2021.

BMC Pregnancy Childbirth · 2024 · PMC11468206 · PMID 39390407

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an increasing trendno p-value reported

Now, the preterm birth rate shows an increasing trend year by year, which has become an issue that China has to pay attention to [ 10 ].

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