https://www.selleckchem.com/pr....oducts/picrotoxin.ht
Current studies suggest that vitamin D deficiency during pregnancy can produce a certain effect for preterm birth (PT, but there is no research showing whether vitamin D deficiency has a consistent effect in different pregnancies; thus, we conducted a systematic review and meta-analysis of 24 observational studies, grouping them according to the gestational age at the time of serum sampling, to investigate whether vitamin D deficiency in different periods of gestation has different effects on PTB and to provide an evidence-based ba
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