Changes in maternal age and prevalence of congenital anomalies during the enactment of China's universal two-child policy (2013-2017) in Zhejiang Province, China: An observational study.

PLoS Med · 2020 · PMC7039412 · PMID 32092053

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an increasing trendno p-value reported

In terms of BD subtypes, CHD remained the predominant abnormality in the period of changing birth policy, with an increasing trend in prevalence.

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