The frequency of T mutation genes in the female population showed a trend of a gradual increase from south to north and from west to east, and TT genotype and T allele had total frequencies of 18.2% and 40.3%, respectively. 3.5 Regional distribution of maternal mortality caused by pregnancy-induced hypertension in Chinese females According to the statistical analysis of the data in the 2021 China Health Statistics Yearbook, a summary table of maternal death causes in 2020 ( Supplementary Table S2 ) was obtained.
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Regional distribution of the MTHFR C677T polymorphism in Chinese females.
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