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Huang S, Kuang J, Zhou F, Jia Q, Lu Q, Feng C, Yang W, Fan G. The association between prenatal cadmium exposure and birth weight: A systematic review and meta-analysis of available evidence. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 251:699-707. [PMID: 31108303 DOI: 10.1016/j.envpol.2019.05.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 04/13/2019] [Accepted: 05/09/2019] [Indexed: 06/09/2023]
Abstract
We conducted a meta-analysis to evaluate the association between prenatal cadmium (Cd) exposure and birth weight. PubMed, Embase, China National Knowledge Infrastructure (CNKI), and Wanfang databases were searched for studies published before March 2019. We used a model-based method, standardizing effect size from linear regression models to include a maximum number of studies during our quantitative evaluations. As a result, 11 articles from the general population, containing 10 birth cohorts and one cross-sectional study, were included. Our meta-analysis demonstrated that a 50% increase of maternal urine Cd (UCd) would be associated with a 6.15 g decrease in neonatal birth weight (β = -6.15 g, 95% CI: -10.81, -1.49) as well as a 50% increase of maternal blood Cd (BCd) would be associated with an 11.57 g decrease (β = -11.57 g; 95% CI: -18.85, -4.30). Stratified analysis of UCd data indicated that the results of female newborns were statistically significant (β = -8.92 g, 95% CI: -17.51, -0.34), as was the first trimester (β = -11.34 g, 95% CI: -19.54, -3.14). Furthermore, increased UCd levels were associated with a higher rate of low birth weight (LBW) risk (OR = 1.12, 95% CI: 1.03, 1.22). This meta-analysis demonstrated that elevated maternal Cd levels are associated with decreased birth weight and higher LBW risk.
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Affiliation(s)
- Shouhe Huang
- Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, PR China; Laboratory of Fear and Anxiety Disorders, Institute of Life Science, Nanchang University, Nanchang, 330031, China
| | - Jie Kuang
- Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, PR China; Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, Nanchang, 330006, China
| | - Fankun Zhou
- Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, PR China; Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, Nanchang, 330006, China
| | - Qiyue Jia
- Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, PR China; Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, Nanchang, 330006, China
| | - Qi Lu
- Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, Nanchang, 330006, China
| | - Chang Feng
- Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, PR China; Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, Nanchang, 330006, China
| | - Wei Yang
- Nevada Center for Health Statistics and Informatics, School of Community Health Sciences, University of Nevada, Reno, USA
| | - Guangqin Fan
- Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, PR China; Department of Occupational Health and Toxicology, School of Public Health, Nanchang University, Nanchang, 330006, China.
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Hu CY, Li FL, Hua XG, Jiang W, Mao C, Zhang XJ. The association between prenatal bisphenol A exposure and birth weight: a meta-analysis. Reprod Toxicol 2018; 79:21-31. [PMID: 29709518 DOI: 10.1016/j.reprotox.2018.04.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 04/16/2018] [Accepted: 04/20/2018] [Indexed: 12/20/2022]
Abstract
The association between prenatal BPA exposure and birth weight is controversial. Here, a meta-analysis was performed to estimate the association between prenatal BPA exposure and birth weight. We searched literature addressing the association of interest in relevant databases. Data were independently extracted and analyzed using partial regression coefficient (β) and/or odds ratio (OR) and their 95% confidence intervals (CIs). We identified 140 references and included 8 studies. Based on the results of meta-analysis, the association between prenatal BPA exposure and continuous birth weight was estimated to be 4.42 g (95% CI: -8.83 to 17.67 g) when comparing the highest vs. the lowest BPA concentration. Findings from this study indicated that prenatal BPA exposure was not statistically associated with continuous birth weight. However, more evidence, based on large prospective cohort studies, is required to provide conclusive evidence on whether or not prenatal BPA exposure is associated with birth weight.
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Affiliation(s)
- Cheng-Yang Hu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Feng-Li Li
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Xiao-Guo Hua
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Wen Jiang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Chen Mao
- Division of Epidemiology, The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - Xiu-Jun Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, China.
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Reyes LM, Davenport MH. Exercise as a therapeutic intervention to optimize fetal weight. Pharmacol Res 2018; 132:160-167. [PMID: 29684673 DOI: 10.1016/j.phrs.2018.04.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 03/16/2018] [Accepted: 04/18/2018] [Indexed: 12/29/2022]
Abstract
The Developmental Origins of Health and Disease suggest the in utero environment programs offspring obesity and cardiovascular disease. Therefore, there is a need to implement safe therapeutic interventions that do not involve the intake of medications or biological products during pregnancy that can improve maternal and fetal health. Prenatal exercise is established to promote maternal and fetal health. It is generally recommended that women accumulate at least 150 min per week of moderate-intensity exercise. It has been demonstrated that prenatal exercise maintains healthy weight gain and improves maternal glucose control, maternal cardiac autonomic control, placental efficiency (increases angiogenesis, downregulates genes involved in fatty acid transport and insulin transport across the placenta, and upregulates genes involved in amino acid transport across the placenta), and oxidative stress. These adaptations following exercise improve maternal metabolism and provide adequate uteroplacental perfusion. In this review, we will focus on exercise as a therapeutic intervention to optimize fetal weight. It has been established that prenatal exercise does not increase the risk of having a small for gestational age baby. To the contrary, prenatal exercise has been associated with the prevention of excessive fat accumulation in the newborn and the maintenance of fetal muscle mass.
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Affiliation(s)
- Laura M Reyes
- Program for Pregnancy and Postpartum Health, Faculty of Kinesiology, Sport and Recreation, 1-052 Li Ka Shing Centre for Health Research Innovation, Women and Children's Health Research Institute, Alberta Diabetes Institute, University of Alberta, T6G 2E1, Alberta, Canada.
| | - Margie H Davenport
- Program for Pregnancy and Postpartum Health, Faculty of Kinesiology, Sport and Recreation, 1-052 Li Ka Shing Centre for Health Research Innovation, Women and Children's Health Research Institute, Alberta Diabetes Institute, University of Alberta, T6G 2E1, Alberta, Canada.
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Li L, Chen YH, Yang YY, Cong L. Effect of Intrahepatic Cholestasis of Pregnancy on Neonatal Birth Weight: A Meta-Analysis. J Clin Res Pediatr Endocrinol 2018; 10:38-43. [PMID: 28825589 PMCID: PMC5838371 DOI: 10.4274/jcrpe.4930] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVE To evaluate the effect of intrahepatic cholestasis of pregnancy (ICP) on neonatal birth weight. METHODS Potential articles were identified by searching PubMed and Web of Science databases on April 30th, 2017. Using the Mantel-Haenszel random-effects or fixed-effects model, outcomes were summarized through weighted mean difference (WMD) and 95% confidence intervals (CI). Potential publication bias was tested using a funnel plot and the methods of Egger's regression and Begg's test. RESULTS A total of eight studies were included in our meta-analysis. Six studies reported data on neonatal birth weight in ICP and control pregnancies. Pooled data from the six studies showed that the birth weight in the ICP group was significantly lighter than in the control group. The overall pooled WMD was -175 g (95% CI: -301, -48). Meanwhile, pooled data from the other two studies indicated that the birth weight in the late-onset ICP group was heavier than in the early-onset ICP group (WMD: 267 g, 95% CI: 168, 366). CONCLUSION Neonatal birth weights in ICP pregnancies were lower than in normal pregnancies. Furthermore, early-onset ICP is associated with a lower birth weight than late-onset ICP.
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Affiliation(s)
- Li Li
- First Affiliated Hospital of Anhui Medical University, Department of Obstetrics and Gynecology, Hefei, China
| | - Yuan-Hua Chen
- Anhui Medical University, Department of Histology and Embryology, Hefei, China
| | - Yuan-Yuan Yang
- First Affiliated Hospital of Anhui Medical University, Department of Obstetrics and Gynecology, Hefei, China
| | - Lin Cong
- First Affiliated Hospital of Anhui Medical University, Department of Obstetrics and Gynecology, Hefei, China,* Address for Correspondence: First Affiliated Hospital of Anhui Medical University, Department of Obstetrics and Gynecology, Hefei, China Phone: +86 181 056 90 602 E-mail:
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