Studies of the associations between maternal exposure to particulate matter(PM) and risk of adverse effects on fetal growth are inconsistent and inconclusive. This question can be well answered by carefully designed b...Studies of the associations between maternal exposure to particulate matter(PM) and risk of adverse effects on fetal growth are inconsistent and inconclusive. This question can be well answered by carefully designed birth cohort studies; however, so far the evidence from such studies has not come to the same conclusion. We sought to evaluate the association between maternal exposures to PM and low birthweight(LBW) enrolling 14 studies from 11 centers,and to explore the influence of trimester and exposure assessment methods on between-center heterogeneity in this association. Data were derived from PubMed, Embase, Google Scholar, CNKI, and WanFang database, references from relevant articles, and results from published studies until March 2017. Using a random-effects meta-analysis, we combined the coefficient and odds ratios(OR) of individual studies conducted among 14 birth cohort studies.Random-effect meta-analysis results suggested that a 17% and 6% increase in risk of LBW was relevant to a 10 μg/m^3 rise in PM_(2.5) and PM_(10) exposure concentrations at the 3 rd trimester(pooled odds ratios(OR), 1.17 and 1.06; 95%confidence interval(CI), 0.94-1.46 and 0.97-1.15, respectively), but the null value was included in our 95% CI. Our results showed that exposure to PM_(2.5) and PM_(10) during pregnancy has a positive relevance to LBW based on birth cohort studies. However, neither reached formal statistical significance. Negative impacts on outcomes of birth is implied by maternal exposure to PM. Further mechanistic researches are needed to explain the connection between PM pollution and LBW.展开更多
Globally,infertility is a serious health problem affecting about 15%of reproductive age couples according to the data reported by the World Health Organization.Non-obstructive azoospermia(NOA)is acknowledged as one of...Globally,infertility is a serious health problem affecting about 15%of reproductive age couples according to the data reported by the World Health Organization.Non-obstructive azoospermia(NOA)is acknowledged as one of the most serious phenotypes of male infertility.Approximately 1%of the male population and 10%of infertile men were affected by NOA(Xie et al.,2022).As reported,meiotic arrest is one of the major etiologies leading to the NOA.展开更多
文摘Studies of the associations between maternal exposure to particulate matter(PM) and risk of adverse effects on fetal growth are inconsistent and inconclusive. This question can be well answered by carefully designed birth cohort studies; however, so far the evidence from such studies has not come to the same conclusion. We sought to evaluate the association between maternal exposures to PM and low birthweight(LBW) enrolling 14 studies from 11 centers,and to explore the influence of trimester and exposure assessment methods on between-center heterogeneity in this association. Data were derived from PubMed, Embase, Google Scholar, CNKI, and WanFang database, references from relevant articles, and results from published studies until March 2017. Using a random-effects meta-analysis, we combined the coefficient and odds ratios(OR) of individual studies conducted among 14 birth cohort studies.Random-effect meta-analysis results suggested that a 17% and 6% increase in risk of LBW was relevant to a 10 μg/m^3 rise in PM_(2.5) and PM_(10) exposure concentrations at the 3 rd trimester(pooled odds ratios(OR), 1.17 and 1.06; 95%confidence interval(CI), 0.94-1.46 and 0.97-1.15, respectively), but the null value was included in our 95% CI. Our results showed that exposure to PM_(2.5) and PM_(10) during pregnancy has a positive relevance to LBW based on birth cohort studies. However, neither reached formal statistical significance. Negative impacts on outcomes of birth is implied by maternal exposure to PM. Further mechanistic researches are needed to explain the connection between PM pollution and LBW.
基金supported by the National Natural Science Foundation of China(82071700,82101679,and 32288101)The University Synergy Innovation Program of Anhui Province in China(GXXT-2021-071).
文摘Globally,infertility is a serious health problem affecting about 15%of reproductive age couples according to the data reported by the World Health Organization.Non-obstructive azoospermia(NOA)is acknowledged as one of the most serious phenotypes of male infertility.Approximately 1%of the male population and 10%of infertile men were affected by NOA(Xie et al.,2022).As reported,meiotic arrest is one of the major etiologies leading to the NOA.
