scholarly journals Maternal smoking behaviour across the first two pregnancies and small for gestational age birth: Analysis of the SLOPE (Studying Lifecourse Obesity PrEdictors) population-based cohort in the South of England

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0260134
Author(s):  
Elizabeth J. Taylor ◽  
Pia Doh ◽  
Nida Ziauddeen ◽  
Keith M. Godfrey ◽  
Ann Berrington ◽  
...  
Keyword(s):  
Gestational Age ◽  
Small For Gestational Age ◽  
Maternal Smoking ◽  
Population Based ◽  
Smoking Behaviour ◽  
Adverse Birth Outcomes ◽  
Full Sample ◽  
Healthcare Data ◽  
Increased Risk ◽  
Never Smokers

Maternal smoking is established to cause adverse birth outcomes, but evidence considering maternal smoking change across successive pregnancies is sparse. We examined the association between self-reported maternal smoking during and between the first two pregnancies with the odds of small for gestational age (SGA) birth (<10th percentile) in the second infant. Records for the first two pregnancies for 16791 women within the SLOPE (Studying Lifecourse Obesity PrEdictors) study were analysed. This is a population-based cohort of prospectively collected anonymised antenatal and birth healthcare data (2003–2018) in Hampshire, UK. Logistic regression was used to relate maternal smoking change to the odds of SGA birth in the second infant. In the full sample, compared to never smokers, mothers smoking at the start of the first pregnancy had higher odds of SGA birth in the second pregnancy even where they stopped smoking before the first antenatal appointment for the second pregnancy (adjusted odds ratio (aOR) 1.50 [95% confidence interval 1.10, 2.03]). If a mother was not a smoker at the first antenatal appointment for either her first or her second pregnancy, but smoked later in her first pregnancy or between pregnancies, there was no evidence of increased risk of SGA birth in the second pregnancy compared to never smokers. A mother who smoked ten or more cigarettes a day at the start of both of her first two pregnancies had the highest odds of SGA birth (3.54 [2.55, 4.92]). Women who were not smoking at the start of the first pregnancy but who subsequently resumed/began smoking and smoked at the start of their second pregnancy, also had higher odds (2.11 [1.51, 2.95]) than never smokers. Smoking in the first pregnancy was associated with SGA birth in the second pregnancy, even if the mother quit by the confirmation of her second pregnancy.

Maternal cumulative exposure to extremely low frequency electromagnetic fields, prematurity and small for gestational age: a pooled analysis of two birth cohorts

2019 ◽  
Vol 77 (1) ◽  
pp. 22-31 ◽  
Author(s):  
Lucile Migault ◽  
Ronan Garlantézec ◽  
Clément Piel ◽  
Laetitia Marchand-Martin ◽  
Sébastien Orazio ◽  
...  
Keyword(s):  
Electromagnetic Fields ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Low Frequency ◽  
Population Based ◽  
Pooled Analysis ◽  
Cumulative Exposure ◽  
Birth Cohorts ◽  
Extremely Low Frequency ◽  
Increased Risk

BackgroundData on the effects of extremely low frequency electromagnetic fields (ELF-EMF) on pregnancy outcomes are inconclusive.ObjectiveTo study the relation between maternal cumulative exposure to ELF-EMF during pregnancy and the risk of prematurity or small for gestational age (SGA) in a pooled analysis of two French birth cohorts.MethodsElfe and Epipage2 are both population-based birth cohorts initiated in 2011 and included 18 329 and 8400 births, respectively. Health data and household, mother and child characteristics were obtained from medical records and questionnaires at maternity and during follow-up. A job exposure matrix was used to assess cumulative exposure to ELF-EMF during three periods: (1) until 15 weeks of gestation, (2) until 28 weeks of gestation and (3) until 32 weeks of gestation. Analyses were restricted to single live births in mainland France and to mothers with documented jobs (N=19 894). Adjusted logistic regression models were used.ResultsAccording to the period studied, 3.2%–4% of mothers were classified as highly exposed. Results were heterogeneous. Increased risks of prematurity were found among low exposed mothers for the three periods, and no association was observed among the most exposed (OR1=0.92 (95% CI 0.74 to 1.15); OR2=0.98 (95% CI 0.80 to 1.21); OR3=1.14 (95% CI 0.92 to 1.41)). For SGA, no association was observed with the exception of increased risk among the low exposed mothers in period 2 and the most exposed in period 3 (OR=1.25 (95% CI 1.02 to 1.53)).ConclusionSome heterogeneous associations between ELF-EMF exposure and prematurity and SGA were observed. However, due to heterogeneity (ie, their independence regarding the level of exposure), associations cannot be definitely explained by ELF-EMF exposure.

scholarly journals Are socioeconomic inequalities in the incidence of small-for-gestational-age birth narrowing? Findings from a population-based cohort in the South of England

BMJ Open ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. e026998 ◽  
Author(s):  
Sam Wilding ◽  
Nida Ziauddeen ◽  
Paul Roderick ◽  
Dianna Smith ◽  
Debbie Chase ◽  
...  
Keyword(s):  
Educational Attainment ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Maternal Smoking ◽  
Employment Status ◽  
Population Based ◽  
Socioeconomic Inequalities ◽  
Lone Mothers ◽  
Primiparous Women ◽  
Over Time

ObjectivesTo investigate socioeconomic inequalities, using maternal educational attainment, maternal and partner employment status, and lone motherhood indicators, in the risk of small-for-gestational-age (SGA) births, their time trend, potential mediation by maternal smoking and body mass index, and effect modification by parity.DesignPopulation-based birth cohort using routine antenatal healthcare data.SettingBabies born at University Hospital Southampton, UK, between 2004 and 2016.Participants65 909 singleton live births born to mothers aged ≥18 years between 24-week and 42-week gestation.Main outcome measuresSGA (birth weight <10th percentile for others born at the same number of completed weeks compared with 2013/2014 within England and Wales).ResultsBabies born to mothers educated up to secondary school level (adjusted OR (aOR) 1.32, 99% CI 1.19 to 1.47), who were unemployed (aOR 1.27, 99% CI 1.16 to 1.38) or with unemployed partners (aOR 1.27, 99% CI 1.13 to 1.43), were at greater risk of being SGA. There was no statistically significant change in the magnitude of this risk difference by these indicators over time between 2004 and 2016, as estimated by linear interactions with year of birth. Babies born to lone mothers were not at higher risk compared with partnered mothers after adjusting for maternal smoking (aOR 1.05, 99% CI 0.93 to 1.20). The inverse association between maternal educational attainment and SGA risk appeared greater in multiparous (aOR 1.40, 99% CI 1.10 to 1.77) compared with primiparous women (aOR 1.28, 99% CI 1.12 to 1.47), and the reverse was true for maternal and partner’s unemployment where the association was stronger in primiparous women.ConclusionsSocioeconomic inequalities in SGA risk by educational attainment and employment status are not narrowing over time, with differences in association strength by parity. The greater SGA risk in lone mothers was potentially explained by maternal smoking. Preventive interventions should target socially disadvantaged women, including preconception and postpartum smoking cessation to reduce SGA risk.

scholarly journals Preconception Hemoglobin Concentration and Risk of Low Birth Weight and Small-for-Gestational-Age: A Large Prospective Cohort Study in China

Nutrients ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 271
Author(s):  
Xiaojing Liu ◽  
Hang An ◽  
Nan Li ◽  
Zhiwen Li ◽  
Yali Zhang ◽  
...  
Keyword(s):  
Birth Weight ◽  
Low Birth Weight ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Prospective Cohort ◽  
Large Population ◽  
Hemoglobin Concentration ◽  
Population Based ◽  
Increased Risk ◽  
The Impact

Less is known about the impact of maternal preconception anemia on birth outcomes. We aimed to examine associations between preconception hemoglobin (Hb) concentrations with risk of low birth weight (LBW) and small-for-gestational-age (SGA). This study was from a large population-based prospective cohort in China and included 124,725 women with singleton live births delivered at gestational ages of 28–45 weeks who were registered before pregnancy. Maternal Hb concentrations were measured during registration, and other health-related information was recorded prospectively. Logistic regression was used to evaluate the associations between preconception Hb concentrations with risk of LBW and SGA, adjusting for potential confounders. The results showed women with preconception anemia accounted for 22.28%. The incidences of LBW/SGA were 2.37%/6.30% among anemic women, and 2.01%/5.48% among non-anemic women, respectively. Preconception mild anemia increased by 17% (95% confidence interval (CI): 1.06, 1.28) and 14% (95% CI: 1.07, 1.21) the risk for LBW and SGA, while moderate-to-severe anemia had no significant association with LBW and SGA. Compared with the 120–129 g/L group, a U-shaped association was observed between preconception Hb concentrations with LBW and SGA. In conclusion, not only maternal anemia but also elevated Hb concentrations before pregnancy contribute to an increased risk of LBW and SGA.

scholarly journals FRI0306 WOMEN WITH AXIAL SPONDYLOARTHRITIS HAVE COMPARABLE RATES OF COMPLICATIONS IN PREGNANCY TO WOMEN IN THE GENERAL POPULATION BUT MORE CAESAREAN DELIVERIES: RESULTS FROM NATIONWIDE CLAIMS DATA

2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 743.2-743
Author(s):  
I. Redeker ◽  
A. Strangfeld ◽  
U. Marschall ◽  
A. Zink ◽  
X. Baraliakos
Keyword(s):  
Birth Weight ◽  
Caesarean Section ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Pregnancy Outcomes ◽  
Axial Spondyloarthritis ◽  
Population Based ◽  
Research Support ◽  
Increased Risk ◽  
Gestational Week

Background:In contrast to other rheumatic inflammatory diseases, studies on pregnancy outcomes in axial spondyloarthritis (axSpA) are scarce, despite its onset in early adulthood affecting women in their reproductive years.Objectives:To investigate maternal and infant pregnancy outcomes among women with axSpA compared with population-based controls.Methods:Taking advantage of a large health insurance dataset, comprising the period 2006 – 2018, maternal and infant pregnancy outcomes and delivery outcomes of women with axSpA were assessed and compared with population-based controls (matched by maternal age and calendar year of birth). Odds ratios (ORs) with 95% confidence intervals (CIs) were calculated using generalised estimating equation analyses.Results:A total of 611 singleton births among 535 women with axSpA were included in the analysis. The mean age at delivery was 32.5 years. The pharmacological treatment within 12 months prior to and after conception is illustrated in the Figure. Infants of women with axSpA were only slightly more often preterm (5.2% vs 4.7%) and small-for-gestational-age (1.6% vs 1.1%) than infants of matched population-based controls, respectively. Caesarean section was performed in 36% of deliveries among women with axSpA compared with 29.5% in population-based controls, resulting in a significantly increased risk for receiving caesarean section (OR 1.35; 95% CI 1.06-1.73) (Table). The occurrence of pre-eclampsia, preterm birth, and small-for-gestational-age was moderately higher, but not significantly increased, among women with axSpA as compared to population-based controls.Conclusion:Women with axSpA had no significantly increased risks for adverse maternal or infant pregnancy outcomes compared to non-axSpA women. However, a significantly increased risk for receiving caesarean section and a tendency for a higher number of preterm deliveries and of small-for-gestational-age infants was observed in women with axSpA.Table.Prevalences and odds ratios with 95% confidence intervals for adverse pregnancy outcomesPregnancies in women with axSpAN=611Pregnancies in population-based controlsN=611Odds Ratio(95% CI)Preterm birth (< week 37)5.2% (32)4.7% (29)1.11 (0.66, 1.85)Gestational week 28-364.9% (30)4.7% (29)1.03 (0.61, 1.75)Gestational week <280.3% (2)0.2% (1)2.01 (0.18, 22.18)Small for gestational age1.6% (10)1.1% (7)1.43 (0.54, 3.79)Low birth weight (<2500 g)2.8% (17)2.6% (16)1.06 (0.53, 2.13)Exceptionally large baby(birth weight ≥4500 g)1.1% (7)0.2% (1)7.07 (0.87, 57.63)Pre-eclampsia7.5% (46)6.4% (39)1.21 (0.78, 1.90)Assisted vaginal delivery4.3% (26)3.1% (19)1.39 (0.76, 2.56)Caesarean section36.0% (220)29.5% (180)1.35 (1.06, 1.73)axSpA, axial Spondyloarthritis; CI, confidence interval.Acknowledgments:We would like to thank the BARMER Statutory Health Insurance for providing data for this study.Disclosure of Interests:Imke Redeker: None declared, Anja Strangfeld Speakers bureau: AbbVie, BMS, Pfizer, Roche, Sanofi-Aventis, Ursula Marschall: None declared, Angela Zink Speakers bureau: AbbVie, Amgen, BMS, Gilead, Hexal, Janssen, Lilly, MSD, Pfizer, Roche, Sanofi Aventis, UCB, Xenofon Baraliakos Grant/research support from: Grant/research support from: AbbVie, BMS, Celgene, Chugai, Merck, Novartis, Pfizer, UCB and Werfen, Consultant of: AbbVie, BMS, Celgene, Chugai, Merck, Novartis, Pfizer, UCB and Werfen, Speakers bureau: AbbVie, BMS, Celgene, Chugai, Merck, Novartis, Pfizer, UCB and Werfen

Maternal exposure to low-to-medium altitude and birth outcomes: evidence from a population-based study in Chinese newborns

2020 ◽  
pp. 1-9
Author(s):  
Binyan Zhang ◽  
Wentao Wu ◽  
Guoshuai Shi ◽  
Baibing Mi ◽  
Fangyao Chen ◽  
...  
Keyword(s):  
Birth Weight ◽  
Linear Relationship ◽  
Birth Outcomes ◽  
Gestational Age ◽  
Population Based ◽  
Adverse Birth Outcomes ◽  
Cross Sectional Survey ◽  
Altitude Effect ◽  
Cross Sectional ◽  
Increased Risk

Abstract Despite high altitude was implicated in adverse birth outcomes, there remained a paucity of evidence on low-to-medium altitude effect. This study aimed to explore the association of low-to-medium altitude with birth outcomes. A population-based cross-sectional survey was performed using a stratified multistage random sampling method among women with their infants born during 2010–2013 in Northwestern China. Altitude was determined in meters based on the village or community of the mother’s living areas. Birth outcomes involved birth weight, gestational age, and small for gestational age (SGA). Generalized linear models were fitted to investigate the association of altitude with birth outcomes. Moreover, the dose–response relationship between altitude and birth outcomes was evaluated with a restricted cubic spline function. A total of 27 801 women with their infants were included. After adjusting for potential confounders, every 100-m increase in the altitude was associated with reduced birth weight by 6.4 (95% CI −8.1, −4.6) g, the slight increase of gestational age by 0.015 (95% CI 0.010, 0.020) week, and an increased risk of SGA birth (odds ratio 1.03, 95% CI 1.02, 1.04). Moreover, there was an inversely linear relationship between altitude and birth weight (P for overall < 0.001 and P for nonlinear = 0.312), and a positive linear relationship between altitude and SGA (P for overall < 0.001 and P for nonlinear = 0.194). However, a nonlinear relationship was observed between altitude and gestational age (P for overall < 0.001 and P for nonlinear = 0.010). The present results suggest that low-to-medium altitude is possibly associated with adverse birth outcomes.

scholarly journals Mediterranean Diet and Lifestyle Habits during Pregnancy: Is There an Association with Small for Gestational Age Infants? An Italian Single Centre Experience

Nutrients ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 1941
Author(s):  
Rachele De Giuseppe ◽  
Manuela Bocchi ◽  
Silvia Maffoni ◽  
Elsa Del Bo ◽  
Federica Manzoni ◽  
...  
Keyword(s):  
Gestational Diabetes ◽  
Mediterranean Diet ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Small Sample Size ◽  
Demographic Data ◽  
Small Sample ◽  
Activity Level ◽  
Lifestyle Habits ◽  
Increased Risk

Background. The small-for-gestational-age (SGA) in infants is related to an increased risk of developing Non-Communicable Diseases later in life. The Mediterranean diet (MD) is related to lower odds of being SGA. The study explored retrospectively the association between SGA, maternal MD adherence, lifestyle habits and other SGA risk factors during pregnancy. Methods. One hundred women (16–44 years) with a pregnancy at term were enrolled. Demographic data, parity, pre-gestational BMI, gestational weight gain, pregnancy-related diseases, and type of delivery were collected. The MD adherence (MEDI-LITE score ≥ 9), physical activity level, and smoking/alcohol consumption were registered. SGA neonates were diagnosed according to the neonatal growth curves. Results. Women were divided into “SGA group” vs. “non-SGA group”. The MD was adopted by 71% of women and its adherence was higher in the “non-SGA group” (p = 0.02). The prevalence of pregnancy-related diseases (gestational diabetes/pregnancy-induced hypertension) was higher in the “SGA group” (p = 0.01). The logistic regression showed that pregnancy-related diseases were the only independent risk factor for SGA. Conclusions. MD may indirectly reduce the risk of SGA since it prevents and exerts a positive effect on pregnancy-related diseases (e.g., gestational diabetes and hypertension). The small sample size of women in the SGA group of the study imposes a major limitation to the results and conclusions of this research, suggesting however that it is worthy of further investigation.

scholarly journals Prevalence of small for gestational age infants in 21 cities in China, 2014–2019

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hui He ◽  
Huazhang Miao ◽  
Zhijiang Liang ◽  
Ye Zhang ◽  
Wei Jiang ◽  
...  
Keyword(s):  
Gestational Age ◽  
Small For Gestational Age ◽  
Health Information System ◽  
Guangdong Province ◽  
Significant Negative Correlation ◽  
Term Infants ◽  
Per Capita Gdp ◽  
Increased Risk ◽  
Per Capita ◽  
Epidemiological Characteristics

AbstractInfants who are small for gestational age (SGA) are at increased risk of neonatal and infant death, non-communicable diseases and growth retardation. However, the epidemiological characteristics of SGA remain unclear. We aim to explore the prevalence of SGA and to examine its socioeconomic associations by using data from 21 cities. 10,515,494 single live birth records between 2014 and 2019 from the Guangdong Women and Children Health Information System were included in the study. Descriptive statistical methods were used to analyze the prevalence trend of SGA and its distribution. We also analyze the associations between the prevalence of SGA and per-capita GDP. The prevalence of SGA in Guangdong Province from the years 2014–2019 was 13.17%, 12.96%, 11.96%, 12.72%, 11.45%, 11.30% respectively, and the overall prevalence was 12.28%. The prevalence of term SGA infants in Guangdong Province was 12.50%, which was much higher than that of preterm SGA (7.71%). There was a significant negative correlation between the SGA prevalence and per-capita GDP in 21 cities of Guangdong Province. The level of economic development may affect the prevalence of SGA. The prevalence of SGA in full term infants is significantly higher than in premature infants, suggesting that most SGA infants may be born at a later gestational age.

scholarly journals 512: Are appropriately sized fetuses who “fall off the curve” at increased risk for small-for-gestational age at birth?

2018 ◽  
Vol 218 (1) ◽  
pp. S306-S307
Author(s):  
Nathan R. Blue ◽  
Mariam Savabi ◽  
Meghan E. Beddow ◽  
Vivek R. Katukuri ◽  
Cody M. Fritts ◽  
...  
Keyword(s):  
Gestational Age ◽  
Small For Gestational Age ◽  
Increased Risk ◽  
Gestational Age At Birth ◽  
Age At Birth

scholarly journals Maternal exposure to airborne polychlorinated biphenyls (PCBs) and risk of adverse birth outcomes

2021 ◽  
Author(s):  
Ane Bungum Kofoed ◽  
Laura Deen ◽  
Karin Sørig Hougaard ◽  
Kajsa Ugelvig Petersen ◽  
Harald William Meyer ◽  
...  
Keyword(s):  
Birth Weight ◽  
Preterm Birth ◽  
Sex Ratio ◽  
Polychlorinated Biphenyls ◽  
Birth Outcomes ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
Maternal Exposure ◽  
Adverse Birth Outcomes ◽  
Secondary Sex Ratio

AbstractHuman health effects of airborne lower-chlorinated polychlorinated biphenyls (LC-PCBs) are largely unexplored. Since PCBs may cross the placenta, maternal exposure could potentially have negative consequences for fetal development. We aimed to determine if exposure to airborne PCB during pregnancy was associated with adverse birth outcomes. In this cohort study, exposed women had lived in PCB contaminated apartments at least one year during the 3.6 years before conception or the entire first trimester of pregnancy. The women and their children were followed for birth outcomes in Danish health registers. Logistic regression was performed to estimate odds ratios (OR) for changes in secondary sex ratio, preterm birth, major congenital malformations, cryptorchidism, and being born small for gestational age. We performed linear regression to estimate difference in birth weight among children of exposed and unexposed mothers. All models were adjusted for maternal age, educational level, ethnicity, and calendar time. We identified 885 exposed pregnancies and 3327 unexposed pregnancies. Relative to unexposed women, exposed women had OR 0.97 (95% CI 0.82, 1.15) for secondary sex ratio, OR 1.13 (95% CI 0.76, 1.67) for preterm birth, OR 1.28 (95% CI 0.81, 2.01) for having a child with major malformations, OR 1.73 (95% CI 1.01, 2.95) for cryptorchidism and OR 1.23 (95% CI 0.88, 1.72) for giving birth to a child born small for gestational age. The difference in birth weight for children of exposed compared to unexposed women was − 32 g (95% CI—79, 14). We observed an increased risk of cryptorchidism among boys after maternal airborne LC-PCB exposure, but due to the proxy measure of exposure, inability to perform dose–response analyses, and the lack of comparable literature, larger cohort studies with direct measures of exposure are needed to investigate the safety of airborne LC-PCB exposure during pregnancy

Sign in / Sign up

Export Citation Format

Share Document