A systematic review of the health effects of prenatal exposure to disaster

Climate change, air pollution and maternal and newborn health: An overview of reviews of health outcomes

Background

Climate change represents a fundamental threat to human health, with pregnant women and newborns being more susceptible than other populations. In this review, we aimed to describe the current landscape of available epidemiological evidence on key climate risks on maternal and newborn health (MNH).

Methods

We sought to identify published systematic and scoping reviews investigating the impact of different climate hazards and air pollution on MNH outcomes. With this in mind, we developed a systematic search strategy based on the concepts of 'climate/air pollution hazards, 'maternal health,' and 'newborn health,' with restrictions to reviews published between 1 January 2010 and 6 February 2023, but without geographical or language restriction. Following full text screening and data extraction, we synthesised the results using narrative synthesis.

Results

We found 79 reviews investigating the effects of climate hazards on MNH, mainly focussing on outdoor air pollution (n = 47, 59%), heat (n = 24, 30%), and flood/storm disasters (n = 7, 9%). Most were published after 2015 (n = 60, 76%). These reviews had consistent findings regarding the positive association of exposure to heat and to air pollution with adverse birth outcomes, particularly preterm birth. We found limited evidence for impacts of climate-related food and water security on MNH and did not identify any reviews on climate-sensitive infectious diseases and MNH.

Conclusions

Climate change could undermine recent improvements in maternal and newborn health. Our review provides an overview of key climate risks to MNH. It could therefore be useful to the MNH community to better understand the MNH needs for each climate hazard and to strengthen discussions on evidence and research gaps and potential actions. Despite the lack of comprehensive evidence for some climate hazards and for many maternal, perinatal, and newborn outcomes, we observed repeated findings of the impact of heat and air pollutants on birth outcomes, particularly preterm birth. It is time for policy dialogue to follow to specifically design climate policy and actions to protect the needs of MNH.

The impact of flood on pregnancy outcomes: A review article

Flood is one of the natural disasters with high prevalence in the world. The aim of this research was to investigate the effect of flood on pregnancy outcome and pregnancy complication such as preterm birth, LBW, SGA, stillbirth, spontaneous abortion, preeclampsia and eclampsia. This is a systematic review based on the PRISMA model that examines pregnancy disorder, pregnancy complication, and reproductive outcomes in floods. For fulfilling of the objectives of the research, related keywords were identified using Mesh and Emtree databases. Then the search was done in the electronic database of Medline, Web of Science, Embase, scopus until 2021.2.10. The search strategy in the Medline database. Database searches resulted in 823 non-duplicate records. After reading the abstracts, 808 articles were excluded. 15 abstracts were eligible for the study, which their full texts were provided. Finally based on inclusion and exclusion criteria 7 articles were included in this study. After flood, the rate of LBW birth and gestational hypertension increases. However, there is no significant difference in preterm birth rates. Pregnancy complications can be reduced or prevented by starting prenatal care early and also by controlling risk factors such as reducing smoking and alcohol consumption.

The Effect of Hospital-Based Childbirth Classes on Birth Outcomes

The purpose of this study was to examine the effect of a hospital-based childbirth preparation class on birth outcomes in nulliparous women (N = 222). Outcomes of expectant mothers who attended the class were compared to a matched control cohort who did not attend preparation classes. Findings revealed women in the intervention group were more likely to give birth vaginally. While trends in a positive direction occurred, no significant difference was found in the frequency of elective induction, preterm birth, or length of stay. Data were also analyzed pre COVID-19 pandemic and 14 weeks after. A shorter time between hospital arrival and birth was significant for the intervention group. In addition, a significant change in elective induction (increase) occurred in the control group.

Disaster Preparedness Among Women With a Recent Live Birth in Hawaii - Results From the Pregnancy Risk Assessment Monitoring System (PRAMS), 2016

OBJECTIVE

The aim of this study was to examine emergency preparedness behaviors among women with a recent live birth in Hawaii.

METHODS

Using the 2016 Hawaii Pregnancy Risk Assessment Monitoring System, we estimated weighted prevalence of 8 preparedness behaviors.

RESULTS

Among 1010 respondents (weighted response rate, 56.3%), 79.3% reported at least 1 preparedness behavior, and 11.2% performed all 8 behaviors. The prevalence of women with a recent live birth in Hawaii reporting preparedness behaviors includes: 63.0% (95% CI: 58.7-67.1%) having enough supplies at home for at least 7 days, 41.3% (95% CI: 37.1-45.6%) having an evacuation plan for their child(ren), 38.7% (95% CI: 34.5-43.0%) having methods to keep in touch, 37.8% (95% CI: 33.7-42.1%) having an emergency meeting place, 36.6% (95% CI: 32.6-40.9%) having an evacuation plan to leave home, 34.9% (95% CI: 30.9-39.2%) having emergency supplies to take with them if they have to leave quickly, 31.8% (95% CI: 27.9-36.0%) having copies of important documents, and 31.6% (95% CI: 27.7-35.8%) having practiced what to do during a disaster.

CONCLUSIONS

One in 10 women practiced all 8 behaviors, indicating more awareness efforts are needed among this population in Hawaii. The impact of preparedness interventions implemented in Hawaii can be tracked with this question over time.

Using social media for health information on COVID-19 risk perceptions and mental health: An online survey of 4,580 pregnant women in China

BACKGROUND

Background: Social media has become an important source of health information during the COVID-19 period. Very little is known about the potential mental impact of social media use on pregnant women.

OBJECTIVE

Objective: The present study examined the association between using social media for health information, risk perception for COVID-19, worry due to COVID-19 and depression among pregnant women in China.

METHODS

Methods: A total of 4,580 pregnant women were recruited from various provinces of China and completed an online survey in March 2020.

RESULTS

Results: More than one-third (39.2%) reported always using social media for health information. Results from structural equation modeling showed that frequency of social media use for health information was positively associated with perceived susceptibility (β = .05, p <.001) and perceived severity of COVID-19 (β = .12, p < .001), which in turn, were positively associated with worry due to COVID-19 (β = .19 and .72, p <.001). Perceived susceptibility (β = .09, p <.001), perceived severity (β = .08, p <.001), and worry due to COVID-19 (β = .15. p <.001) all had a positive association with depression. Results from bootstrapping analysis showed that the indirect effects of frequency of social media use for health information on worry due to COVID-19 and depression were both significant.

CONCLUSIONS

Conclusions: The present study provided empirical evidence on how social media use for health information might have a negative impact on pregnant women's mental health. Interventions are needed to equip them with the skills to use social media properly.

CLINICALTRIAL

Postnatal Depression Risk Factors: An Overview of Reviews to Inform COVID-19 Research, Clinical, and Policy Priorities

The disruption of normal life due to the COVID-19 pandemic is expected to exacerbate extant risk factors for mental health problems. This may be particularly true for women who give birth during the crisis, especially those at risk for postnatal depression. Maternal postnatal depression has been identified as a public health issue with profound impacts on maternal and child well-being. Evidence from previous crises (e.g., earthquakes, terrorist attacks) has shown that crises significantly impact maternal mental health and some perinatal health outcomes. The aims of this paper were therefore to conduct a review to identify the established risk factors for maternal postnatal depression, and generate evidence-based hypotheses about whether the COVID-19 crisis would likely increase or decrease postnatal depression rates based on the identified risk factors. Several databases were searched during May-June 2020 for review papers (i.e., systematic reviews, meta-analyses, qualitative syntheses) using the following keywords: Depression, perinatal, postnatal, postpartum, systematic, review, predictors. Risk factors were extracted in conjunction with indicators for their strength of evidence (i.e., effect sizes, qualitative coding). Risk factors were critically evaluated in relation to their susceptibility to the impacts of the COVID-19 crisis. It was hypothesized that several health policies that were necessary to reduce the spread of COVID-19 (e.g., required restrictions) may be simultaneously impacting a range of these known risk factors and placing a larger number of women at heightened risk for postnatal depression. For instance, factors at a strong risk of being exacerbated include: Perceived low social support; exposure to traumatic events during or prior to pregnancy; significant life events occurring during pregnancy; and high stress associated with care of children. Future research and policy implications are discussed, including how policy makers could attempt to ameliorate the identified risk factors for postnatal depression following the current COVID-19 pandemic.

Disasters, children and the kidneys

Following disasters, children are physically, psychologically and socially more vulnerable than adults; consequently, their morbidity and mortality are higher. The risks are especially high for orphans and unaccompanied children who are separated from their families, making them frequently victims of human trafficking, slavery, drug addiction, crime or sexual exploitation. Education of children and families about disaster-related risks and providing special protection in disaster preparedness plans may mitigate these threats. Kidney disease patients, both paediatric and adult, are extra vulnerable during disasters, because their treatment is dependent on technology and functioning infrastructure. Acute kidney injury, chronic kidney disease patients not on dialysis and dialysis and transplant patients are faced with extensive problems. Overall, similar treatment principles apply both for adults and paediatric kidney patients, but management of children is more problematic, because of substantial medical and logistic difficulties. To minimize drawbacks, it is vital to be prepared for renal disasters. Preparedness plans should address not only medical professionals, but also patients and their families. If problems cannot be coped with locally, calling for national and/or international help is mandatory. This paper describes the spectrum of disaster-related problems in children and the specific features in treating acute and chronic kidney disease in disasters.

Psychological First Aid: A Model for Disaster Psychosocial Support for the Perinatal Population

The psychosocial needs of childbearing families drastically change after a disaster. Perinatal nurses providing postdisaster maternal-newborn care at community shelters, field hospitals, or acute care facilities must be prepared as "first responders" to address the immediate psychological distress and social needs of women and families in the first few chaotic days or weeks. The purpose of this article is to demonstrate ways nurses can integrate psychosocial and interpersonal interventions in perinatal disaster care using the framework of Psychological First Aid (PFA) developed by a team of mental health experts, along with The National Child Traumatic Stress Network and the United States (US) National Center for posttraumatic stress disorder (PTSD). The PFA framework offers evidence-informed stepwise approaches nurses can employ within their scope of practice aimed at reducing disaster survivors' initial distress and to promote short- and long-term adaptive functioning. Purposive interactions are suggested to provide emotional support, empathy, and guidance to reduce stress, restore coping skills, and help families use their strengths to begin the recovery process. Nurse leaders engaged in hospital disaster planning need to ensure that essential resources and community networks are available to provide mental health and psychosocial support for childbearing women and families in a postdisaster environment.

In-utero stress and mode of conception: impact on regulation of imprinted genes, fetal development and future health

BACKGROUND

Genomic imprinting is an epigenetic gene regulatory mechanism; disruption of this process during early embryonic development can have major consequences on both fetal and placental development. The periconceptional period and intrauterine life are crucial for determining long-term susceptibility to diseases. Treatments and procedures in assisted reproductive technologies (ART) and adverse in-utero environments may modify the methylation levels of genomic imprinting regions, including insulin-like growth factor 2 (IGF2)/H19, mesoderm-specific transcript (MEST), and paternally expressed gene 10 (PEG10), affecting the development of the fetus. ART, maternal psychological stress, and gestational exposures to chemicals are common stressors suspected to alter global epigenetic patterns including imprinted genes.

OBJECTIVE AND RATIONALE

Our objective is to highlight the effect of conception mode and maternal psychological stress on fetal development. Specifically, we monitor fetal programming, regulation of imprinted genes, fetal growth, and long-term disease risk, using the imprinted genes IGF2/H19, MEST, and PEG10 as examples. The possible role of environmental chemicals in genomic imprinting is also discussed.

SEARCH METHODS

A PubMed search of articles published mostly from 2005 to 2019 was conducted using search terms IGF2/H19, MEST, PEG10, imprinted genes, DNA methylation, gene expression, and imprinting disorders (IDs). Studies focusing on maternal prenatal stress, psychological well-being, environmental chemicals, ART, and placental/fetal development were evaluated and included in this review.

OUTCOMES

IGF2/H19, MEST, and PEG10 imprinted genes have a broad developmental effect on fetal growth and birth weight variation. Their disruption is linked to pregnancy complications, metabolic disorders, cognitive impairment, and cancer. Adverse early environment has a major impact on the developing fetus, affecting mostly growth, the structure, and subsequent function of the hypothalamic-pituitary-adrenal axis and neurodevelopment. Extensive evidence suggests that the gestational environment has an impact on epigenetic patterns including imprinting, which can lead to adverse long-term outcomes in the offspring. Environmental stressors such as maternal prenatal psychological stress have been found to associate with altered DNA methylation patterns in placenta and to affect fetal development. Studies conducted during the past decades have suggested that ART pregnancies are at a higher risk for a number of complications such as birth defects and IDs. ART procedures involve multiple steps that are conducted during critical windows for imprinting establishment and maintenance, necessitating long-term evaluation of children conceived through ART. Exposure to environmental chemicals can affect placental imprinting and fetal growth both in humans and in experimental animals. Therefore, their role in imprinting should be better elucidated, considering the ubiquitous exposure to these chemicals.

WIDER IMPLICATIONS

Dysregulation of imprinted genes is a plausible mechanism linking stressors such as maternal psychological stress, conception using ART, and chemical exposures with fetal growth. It is expected that a greater understanding of the role of imprinted genes and their regulation in fetal development will provide insights for clinical prevention and management of growth and IDs. In a broader context, evidence connecting impaired imprinted gene function to common diseases such as cancer is increasing. This implies early regulation of imprinting may enable control of long-term human health, reducing the burden of disease in the population in years to come.

Effects of interventions for women and their partners to reduce or prevent stress and anxiety: A systematic review

BACKGROUND

The period from conception to two years postpartum (the first 1000 days) represents a normative transitional period, which can be potentially stressful for some parents. Parental stress and anxiety adversely impacts psychological and physical health for parents and children.

AIM

The aim of this review is to systematically examine effects of interventions for women and their partners to reduce or prevent stress and/or anxiety during the first 1000 days.

METHODS

MEDLINE, Embase, CINAHL, PsychINFO, and Maternity and Infant Care were searched from inception to March 2019. Randomised controlled trials examining intervention effects on parental stress and/or anxiety during first 1000 days were eligible for inclusion. Data were independently extracted by two reviewers and narratively synthesised.

FINDINGS

Fifteen interventions, reported in 16 studies, met inclusion criteria (n=1911 participants). Overall, findings were inconsistent and the majority of trials demonstrated high risk of bias. Interventions were predominantly delivered to women during pregnancy and only two studies included fathers. There was some evidence that adapting interventions to the pre and postnatal periods provided benefits for stress and anxiety reduction, however there was limited evidence for individual intervention types or approaches.

CONCLUSIONS

There is currently inconsistent evidence of what interventions are most effective for women during the first 1000 days and there is insufficient evidence for any interventions for male partners during this period. There is a clear need for rigorous development and examination of interventions developed specifically to reduce or prevent stress and/or anxiety across the first 1000 days.

PALTEM: What Parameters Should Be Collected in Disaster Settings to Assess the Long-Term Outcomes of Famine?

Evidence suggests that nutritional status during fetal development and early life leaves an imprint on the genome, which leads to health outcomes not only on a person as an adult but also on his offspring. The purpose of this study is to bring forth an overview of the relevant parameters that need to be collected to assess the long-term and transgenerational health outcomes of famine. A literature search was conducted for the most pertinent articles on the epigenetic effects of famine. The results were compiled, synthesized and discussed with an expert in genetics for critical input and validation. Prenatal and early life exposure to famine was associated with metabolic, cardiovascular, respiratory, reproductive, neuropsychiatric and oncologic diseases. We propose a set of parameters to be collected in disaster settings to assess the long-term outcomes of famine: PALTEM (parameters to assess long-term effects of malnutrition).

Continuity of midwifery carer moderates the effects of prenatal maternal stress on postnatal maternal wellbeing: the Queensland flood study

Poor postnatal mental health is a major public health issue, and risk factors include experiencing adverse life events during pregnancy. We assessed whether midwifery group practice, compared to standard hospital care, would protect women from the negative impact of a sudden-onset flood on postnatal depression and anxiety. Women either received midwifery group practice care in pregnancy, in which they were allocated a primary midwife who provided continuity of care, or they received standard hospital care provided by various on-call and rostered medical staff. Women were pregnant when a sudden-onset flood severely affected Queensland, Australia, in January 2011. Women completed questionnaires on their flood-related hardship (objective stress), emotional reactions (subjective stress), and cognitive appraisal of the impact of the flood. Self-report assessments of the women's depression and anxiety were obtained during pregnancy, at 6 weeks and 6 months postnatally. Controlling for all main effects, regression analyses at 6 weeks postpartum showed a significant interaction between maternity care type and objective flood-related hardship and subjective stress, such that depression scores increased with increasing objective and subjective stress with standard care, but not with midwifery group practice (continuity), indicating a buffering effect of continuity of midwifery carer. Similar results were found for anxiety scores at 6 weeks, but only with subjective stress. The benefits of midwifery continuity of carer in pregnancy extend beyond a more positive birth experience and better birthing and infant outcomes, to mitigating the effects of high levels of stress experienced by women in the context of a natural disaster on postnatal mental health.

Self-Reported Oil Spill Exposure and Pregnancy Complications: The GROWH Study

Adverse infant outcomes often rise in the aftermath of disaster, but few studies have assessed the effects of disaster on maternal health. 1091 southern Louisiana women were interviewed about their pregnancy history, including pregnancy complications. Associations between oil spill exposures and gestational diabetes, hypertensive disorders, and nausea/vomiting were assessed for all reported pregnancies. 631 women had a pregnancy both before and after the oil spill. Generalized estimating equations (logistic regression) with adjustment for confounders were used. To assess possible unmeasured confounding, instead of considering oil spill exposure as a time-varying exposure, women were defined as oil spill-exposed or not. If oil spill-exposed women were equally prone to complications in pregnancies that occurred prior to the oil spill as after it, it was considered that any associations were likely due to selection or reporting issues. Women who reported oil spill exposure, particularly loss of use of the coast, were more likely to report gestational diabetes; however, the level of association was similar for pregnancies before and after the spill (p for interaction >0.10 and odds ratios (ORs) for pregnancies prior to the spill > than those after the spill). No associations were found between oil spill exposure and hypertensive disorders. This analysis does not suggest an increased risk of pregnancy complications associated with exposure to the oil spill; however, future studies should assess exposure and outcomes prospectively and clinically instead of relying on self-report.

Graduate public health training in healthcare of refugee asylum seekers and clinical human rights: evaluation of an innovative curriculum

OBJECTIVES

An innovative curriculum was developed to equip public health students with appropriate attitude and skills to address healthcare of asylum seekers.

METHODS

Implemented in 2005 the curriculum included: (1) didactic sessions covering epidemiology and health sequelae of torture, asylum laws, and approaches to identify survivors' healthcare needs; (2) panel discussions with survivors and advocates; and (3) participating in medico-legal process of asylum seeking. Complementary mixed methods evaluations included pre- and post-curriculum questionnaires, formal curriculum evaluations, final papers and oral presentations.

RESULTS

125 students participated. Students showed improved knowledge regrading sequelae of abuse and survivors' healthcare needs (P < 0.01), improved attitudes towards working with survivors (P < 0.05) and self-efficacy in identifying at-risk populations and addressing healthcare of survivors (P < 0.05). Students reported increased desire to pursue global health and human rights careers.

CONCLUSIONS

As an advocacy and cultural competency training in public health practice addressing healthcare of refugees domestically, this curriculum was well received and effective, and will also help students better serve other similar populations. Population case-based domestic opportunities to teach global health and health and human rights should be effectively utilized to develop a well-equipped global health corps.