Food Choice and Dietary Perspectives of Young, Urban, Black Pregnant Women: A Focus Group Study.

Black pregnant women in Chicago are disproportionately affected by maternal morbidity and mortality and are more likely to reside in neighborhoods that experience greater economic hardships and food apartheid than any other race/ethnicity. Addressing social determinants of health such as structural inequities, economic environment, and food apartheid issues may provide insights into eliminating Black maternal morbidity and mortality disparities. This study explores food choice determinants and dietary perspectives of young, urban, Black pregnant women. Two audio-recorded focus groups were conducted in Chicago, IL between March 2019 and June 2019 to discuss pregnancy experiences and factors affecting maternal nutrition. Thematic analysis was used to identify the codes, themes, and subthemes of the data. Data analysis was guided by the Social Ecological Model (SEM) as a theoretical framework. Eleven, young, Black women were recruited. Three major themes were discussed across the SEM levels that influenced food choice including food access, stress and family influences on eating, and the need for nutritional education during pregnancy. These choices were primarily rooted in the detrimental effects of food apartheid experienced within the participants' neighborhoods. Therefore, acknowledging, understanding, and addressing food apartheid and its impact on Black maternal health disparities is needed in clinical practice, research, and policy change.

Mediterranean Diet Adherence and Depressive Symptoms among a Nationally Representative Sample of Pregnant Women in the United States.

BACKGROUND: Prenatal depression affects ∼12% of pregnant women in the United States and is associated with an increased risk of adverse birth outcomes and maternal mortality. Adherence to a healthy dietary pattern may reduce and/or protect against depressive symptoms. OBJECTIVES: To investigate the relationship between adherence to a Mediterranean diet and depressive symptoms among pregnant women in the United States. METHODS: We used data from the National Health and Nutrition Examination Survey (2005-2018, N = 540) and included pregnant women aged 18-44 y with a positive urine pregnancy test. The Mediterranean diet score (aMED) was calculated from 1 24-h recall; aMED typically ranges from 0-9, but in these analyses, it ranged from 0-8 because alcohol was not included. The aMED score was dichotomized as high (>3) compared with low (≤3). The Patient Health Questionnaire-9 (PHQ-9), which measures depressive symptoms, was dichotomized as lower compared with higher (PHQ-9 score ≥10), based on the clinical cutoff for patient referral. Our primary model employed logistic regression to investigate the association between aMED adherence and high depressive symptoms when controlling for socio-demographics (age, racial/ethnicity, education, poverty, and relationship status), total calories, and prepregnancy body mass index (kg/m2). We also modeled the PHQ-9 score as a continuous variable using a random-effects model. RESULTS: About 5% of pregnant women had moderate to severe depressive symptoms, and 45% were highly adherent to a Mediterranean diet. Higher adherence to a Mediterranean diet was associated with lower odds of depressive symptoms (odds ratio: 0.31, 95% confidence interval: 0.10, 0.98). Results were not significant for the continuous PHQ-9 score (ß: -0.30; 95% confidence interval: -0.90, 0.30). CONCLUSIONS: Adherence to a Mediterranean diet may have the potential to lower depressive symptoms among pregnant women; however, these results should be interpreted with caution. Nevertheless, considering the public health significance of promoting mental wellness among pregnant women, this relationship merits further examination using experimental designs.

Correction: OjiNjideka Hemphill et al. Feasibility Study of Lactobacillus Plantarum 299v Probiotic Supplementation in an Urban Academic Facility among Diverse Pregnant Individuals. Nutrients 2023, 15, 875.

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Structural Violence and Stress Experiences of Young Pregnant Black People.

INTRODUCTION: Approximately 10-20% of individuals suffer from mental health concerns during the prenatal period due to their vulnerability and emotional responses to stressful events. Mental health disorders are more likely to be disabling and persistent for people of color, and they are less likely to seek treatment due to stigma. Young pregnant Black people report experiencing stress due to isolation, feelings of conflict, lack of material and emotional resources, and support from significant others. Although many studies have reported the types of stressors experienced, personal resources, emotional stress responses on pregnancy, and mental health outcomes, there is limited data on young Black women's perceptions of these factors. METHODS: This study utilizes the Health Disparities Research Framework to conceptualize drivers of stress related to maternal health outcomes for young Black women. We conducted a thematic analysis to identify stressors for young Black women. RESULTS: Findings revealed the following overarching themes: Societal stress of being young, Black, and pregnant; Community level systems that perpetuate stress and structural violence; Interpersonal level stressors; Individual level effects of stress on mom and baby; and Coping with stress. DISCUSSION: Acknowledging and naming structural violence and addressing structures that create and fuel stress for young pregnant Black people are important first steps to interrogating systems that allow for nuanced power dynamics and for recognizing the full humanity of young pregnant Black people.

Associations between plant-based diets, plant foods and botanical supplements with gestational diabetes mellitus: a systematic review protocol.

INTRODUCTION: Gestational diabetes mellitus (GDM) is one of the most common health complications during pregnancy. Medical nutrition therapy is the mainstay of treatment for GDM, however, there is no current consensus on optimal dietary approaches to prevent or control hyperglycaemia in pregnancy. The aim of this systematic review is to assess the relationships between plant-based dietary patterns, plant foods and botanical dietary supplements with GDM and maternal glycaemic biomarkers. METHODS AND ANALYSIS: A predefined search strategy was used on 16 June 2021, to search PubMed, Embase and CINAHL Plus with Full Text (EBSCOhost), as well as ClinicalTrials.gov, for studies published as original articles in English. Articles will be included if they are human observational studies or clinical trials and will be excluded if they are review articles or conference abstracts. We will use Cochrane's risk of bias tools for interventions that are parallel arm (Risk of Bias tool for randomised trials version 2 (RoB 2)) and single arm, non-randomised intervention studies (Risk of Bias In Non-randomised Studies-of Interventions (ROBINS-I)). For observational, case-control and cross-sectional studies, we will use the National Heart, Lung and Blood Institute's quality assessment tools. Data will be synthesised in a narrative format describing significant results as well as presenting the results of the quality assessment of studies. ETHICS AND DISSEMINATION: This systematic review does not require ethical approval as primary data will not be collected. The review will be published in a peer-reviewed journal and disseminated electronically and in print. PROSPERO REGISTRATION NUMBER: CRD42022306915.

Feasibility Study of Lactobacillus Plantarum 299v Probiotic Supplementation in an Urban Academic Facility among Diverse Pregnant Individuals.

(1) Background: Despite iron intake recommendations, over a quarter of pregnant individuals have iron deficiency. Lactobacillus plantarum 299v (Lp299v®) enhances iron absorption in non-pregnant populations and may have positive effects in pregnancy among those with sufficient iron stores; however, no studies have evaluated the effect of Lp299v® on maternal and neonatal iron status among individuals at risk for iron deficiency anemia in pregnancy. Thus, this study aims to assess the feasibility and preliminary efficacy of daily oral Lp299v® maternal supplementation among diverse pregnant individuals. (2) Methods: In this double-blind placebo-controlled randomized supplementation feasibility study, participants were randomized to probiotic Lp299v® + prenatal vitamin with iron or placebo + prenatal vitamin with iron from 15-20 weeks of gestation through delivery. (3) Results: Of the 20 enrolled and randomized participants, 58% (7/12) from the Lp299v® group and 75% (6/8) from the placebo group were retained. Adherence to supplementation was 72% for Lp299v®/placebo and 73% for the prenatal vitamin. A slower decline in maternal hematological and iron parameters across pregnancy was observed in the Lp299v® group compared to placebo. (4) Conclusions: Lp299v® may be a tolerable therapy during pregnancy and has the potential to affect maternal and neonatal hematological and iron status.

Obstetric experiences of young black mothers: An intersectional perspective.

BACKGROUND: In Chicago, maternal morbidity and mortality is six times more likely among Black birthing people than white, despite policy initiatives to promote maternal health equity. Disparities in maternal morbidity and mortality reflect experiences of structural inequities - including limited quality obstetric care, implicit bias, and racism resulting patient mistrust in the health care system, inadequate social support, and financial insecurity. Although there is published literature on Black women's experiences with obstetric care, including experiences with individual and structural racism, little is known about the intersection of age and race and experiences with health care. The purpose of this study was to explore the maternal health and pregnancy experiences of young Black women utilizing an intersectional theoretical lens. METHODS: In this study, we conducted two focus groups in a sample of 11 young Black pregnant people. We conducted a thematic analysis to identify codes, themes, and subthemes of the data. RESULTS: We developed two overarching themes: obstetric racism and obstetric resistance. To elucidate how obstetric racism framed our participants' healthcare experiences, we identified sub-themes: intersectional identities as young Black women, medical mistrust, and pregnancy trauma. The second major theme describes ways in which participants protected themselves against obstetric racism to engender positive health experiences. These methods of resistance included identifying advocates and relying on trusted providers. CONCLUSIONS: The current standard of obstetric care in the US is suboptimal due to individual and structural racism. This study provides unique data on the experiences with health care for young, Black pregnant individuals and delivers valuable insight into how individual and structural racism impacts obstetric care for young Black women.

Efficacy of behavioral interventions to improve maternal mental health and breastfeeding outcomes: a systematic review.

BACKGROUND: Despite extensive benefits and high intentions, few mothers breastfeed exclusively for the recommended duration. Maternal mental health is an important underlying factor associated with barriers and reduced rates of breastfeeding intent, initiation, and continuation. Given evidence of a bidirectional association between maternal mental health and breastfeeding, it is important to consider both factors when examining the efficacy of interventions to improve these outcomes. The purpose of this manuscript is to review the literature on the efficacy of behavioral interventions focused on both maternal mental health and breastfeeding outcomes, examining the intersection of the two. METHODS: This systematic review was completed using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) reporting guidelines. Studies were selected if they were available in English, used primary experimental design, and used a behavioral intervention type to examine maternal mental health and breastfeeding outcomes. Articles were identified from PubMed, CINAHL, Embase, and PsycINFO from database inception to 3 March 2022. Study quality was assessed using the Cochrane Risk of Bias tool. Results were synthesized by intervention success for 1. Mental health and breastfeeding, 2. Breastfeeding only, 3. Mental health only, and 4. No intervention effect. PROSPERO CRD42021224228. RESULTS: Thirty interventions reported in 33 articles were identified, representing 15 countries. Twelve studies reported statistically significant positive effect of the intervention on both maternal mental health and breastfeeding; most showing a decrease in self-report depressive and/or anxiety symptoms in parallel to an increase in breastfeeding duration and/or exclusivity. Common characteristics of successful interventions were a) occurring across pregnancy and postpartum, b) delivered by hospital staff or multidisciplinary teams, c) offered individually, and d) designed to focus on breastfeeding and maternal mental health or on breastfeeding only. Our results are not representative of all countries, persons, experiences, circumstances, or physiological characteristics. CONCLUSIONS: Interventions that extend the perinatal period and offer individualized support from both professionals and peers who collaborate through a continuum of settings (e.g., health system, home, and community) are most successful in improving both mental health and breastfeeding outcomes. The benefits of improving these outcomes warrant continued development and implementation of such interventions. SYSTEMATIC REVIEW REGISTRATION: PROSPERO CRD42021224228.

Recruitment and Retention of Urban Pregnant Women to a Clinical Study Administering an Oral Isotope Dietary Tracer.

Introduction: Pregnant women are a vulnerable population that are difficult to engage in clinical research. We report successful recruitment and retention strategies used in a longitudinal pilot study of urban racially/ethnically diverse pregnant women that involved administration of an orally ingested isotope tracer, multiple venipunctures, biopsy of placenta after delivery, and cord or placental blood collection. Materials and Methods: We used direct strategies to recruit English-speaking obese and nonobese pregnant women aged 17-45 years, who were in the third trimester of pregnancy. The study required data collection at 32-34 and 34-36 gestational weeks and delivery. Strategies included frequent personal engagement with participants and staff to build relationships and trust, tangible appreciation, and the study team being present at delivery. In addition, leveraging hospital information technology (IT) services was critical to ensure retention through labor and delivery (LD). Results: A racially (52% Black, 23% White, and 10% other) and ethnically (15% Hispanic or Latinx) diverse sample of pregnant women was enrolled. Of the 52 women enrolled, 85% of women completed all procedures. Conclusions: This is the first report of successful strategies for recruitment and retention of racially/ethnically diverse pregnant women in a longitudinal study requiring oral administration of an isotope tracer. Personal engagement with multiple touch points, starting with recruitment and continuing regularly throughout the third trimester, was the most successful strategy. Creating and maintaining relationships with the LD providers and staff and utilizing hospital IT, including targeted electronic medical record alerts, ensured successful retention for the duration of the study. Trial Registration: Not applicable.

Feasibility of a Web-Based Intervention to Prevent Perinatal Depression and Promote Human Milk Feeding: Randomized Pilot Trial.

BACKGROUND: Mothers who identify as Black or African American are more likely to report depressed moods in late pregnancy and early postpartum and have the lowest rates of human milk feeding compared with all other racial groups in the United States. Internet interventions offer the potential to extend preventative and supportive services as they address key barriers, particularly for those navigating the complex and vulnerable early postpartum period. However, there is limited evidence on the feasibility of such interventions for preventing perinatal mental health disorders and improving human milk feeding outcomes in Black mothers. OBJECTIVE: This pilot study aimed to assess the feasibility and preliminary findings of a web-based cognitive behavioral therapy-based internet intervention, with and without human milk feeding education and support, to prevent perinatal depression and promote human milk feeding in Black mothers. METHODS: Participants were Black-identifying individuals between 20 and 28 weeks of pregnancy with human milk feeding intention and mild to moderate depressive symptoms (Patient Health Questionnaire scores 5-14). Participants were randomized to either Sunnyside, a 6-week cognitive behavioral therapy-based web-based intervention, or Sunnyside Plus, which included additional education and support to promote human milk feeding. Assessments occurred at baseline, third trimester (end of antenatal treatment), 6 weeks postpartum (end of postpartum treatment), and 12 weeks postpartum. The primary focus of this randomized pilot trial was the feasibility and preliminary outcomes of mental health and human milk feeding. RESULTS: A total of 22 tertiary-educated participants were randomized. The mean number of log-ins was 7.3 (SD 5.3) for Sunnyside and 13.8 (SD 10.5) for Sunnyside Plus. Scores of depression and anxiety measures remained below the clinical threshold for referral to treatment in both groups. All the participants initiated human milk feeding (18/18, 100%). Most participants reported at least some human milk feeding at both 6 and 12 weeks postpartum (6/7, 86%; 11/11, 100%, or 10/10, 100%, for Sunnyside and Sunnyside Plus, respectively). CONCLUSIONS: The results suggest that tertiary-educated Black mothers at risk for perinatal depression and who intended to human milk feed were receptive to and satisfied with a web-based cognitive behavioral therapy-based internet intervention, with and without human milk feeding education and support. Preliminary findings indicate that both Sunnyside and Sunnyside Plus interventions have the potential to affect symptoms of depression, anxiety, and human milk feeding outcomes. TRIAL REGISTRATION: ClinicalTrials.gov NCT04128202; https://www.clinicaltrials.gov/ct2/show/NCT04128202.

Adherence to a Mediterranean Diet Is Associated with Lower Depressive Symptoms among U.S. Adults.

Depression is a leading cause of disability, yet current prevention and treatment approaches have only had modest effects. It is important to better understand the role of dietary patterns on depressive symptoms, which may help prevent depression or complement current treatments. This study examined whether adherence to a Mediterranean diet (Med Diet), determined by the Alternate Med Diet score (aMED), was associated with depressive symptoms in a representative sample of U.S. adults. The aMED score (range 0-9) was calculated from a 24-h diet recall with gender-specific quartiles (Q) estimated. The Patient Health Questionnaire-9 (PHQ-9) was used to define depressive symptoms, which was dichotomized as no to mild (0-9) versus moderate to severe symptoms (10-27). Logistic regression was used to investigate the association between quartiles of aMED and depressive symptoms when controlling for sociodemographics, total calories, and the time of year of diet recall; 7.9% of the sample had moderate to severe depressive symptoms. Compared to individuals with the lowest aMED (Q1), individuals in Q3 and Q4 had 40% and 45% lower odds of moderate to severe depressive symptoms (odds ratio [OR] = 0.60, 95% confidence interval [CI]: 0.50, 0.74; OR = 0.55, 95% CI: 0.36, 0.84, respectively). This study provides modest support of Med Diet's role in supporting positive mental health.

Relationships between Thai fathers' self-efficacy to support breastfeeding and exclusive breastfeeding duration.

OBJECTIVE: To determine associations between Thai fathers' self-efficacy to support exclusive breastfeeding and exclusive breastfeeding duration. DESIGN: A descriptive quantitative design was used. PARTICIPANTS AND SETTINGS: The study sample consisted of 205 father-mother couples (410 participants) with an infant who was 6 months old. Data were conducted from well-baby clinics of two hospitals in Thailand's Chiang Mai province from January to March 2020. MEASUREMENT: Each participant completed a sociodemographic questionnaire and Breastfeeding Self-Efficacy Scale (Short-Form). Father participants also completed the Father's Attitude toward Exclusive Breastfeeding questionnaire. FINDINGS: Bivariate correlation analyses of survey data showed that paternal and maternal breastfeeding self-efficacy scores were positively associated with longer duration of exclusive breastfeeding (ρ=0.19 and ρ=0.54, respectively). Paternal self-efficacy scores were also positively correlated with maternal self-efficacy scores (ρ=0.30, p=.01). However, the results of Tobit regression analyses indicated that paternal self-efficacy scores did not moderate the relationship between maternal self-efficacy scores and exclusive breastfeeding duration. Only maternal self-efficacy scores were significantly associated with duration of exclusive breastfeeding (B=.16, p<.01). KEY CONCLUSIONS: This is the first Thai study to assess the relationship between fathers' breastfeeding support self-efficacy and exclusive breastfeeding duration. The results increase our understanding of paternal factors that impact exclusive breastfeeding duration. Although paternal self-efficacy did not moderate the effects of maternal self-efficacy on exclusive breastfeeding duration in this study, paternal self-efficacy positively related to maternal self-efficacy and breastfeeding duration. IMPLICATION FOR PRACTICE: Paternal breastfeeding support self-efficacy should be promoted in co-parenting breastfeeding interventions both antenatal care clinics and postpartum units to promote exclusive breastfeeding and increase Thailand's overall exclusive breastfeeding rate.

A Mixed-Methods Examination of Inpatient Breastfeeding Education Using a Human Factors Perspective.

Objective: The objective of this study was to examine postpartum, inpatient mother-lactation educator (LE) breastfeeding education, resulting perceptions, and patient-reported worries and outcomes. In the breastfeeding literature, there is inadequate insight into the mother-LE relationship, and specifically, the extent to which contextual factors are elicited and information is tailored accordingly. In this study, we were specifically interested in maternal contextual factors. Materials and Methods: Using a mixed methods approach, we (1) captured 20 postpartum, inpatient mother-LE breastfeeding education sessions and analyzed them for the presence of maternal contextual factors, (2) administered separate perception questions to mothers and LEs, and (3) conducted 13 follow-up interviews with mothers after being discharged from the hospital. Results: Inpatient breastfeeding education is delivered in dynamic and busy clinical settings, characterized by potential distractions such as delivery of medical care. Maternal contextual factors are infrequently elicited during the education. Although both LEs and mothers rate the sessions positively, potential gaps remain as highlighted by the analyses of semistructured interviews with mothers. Conclusion: Human factors perspective, theories, and methods are relevant to the characterization of facilitators and barriers of current breastfeeding education, as well as to the development of interventions to support the delivery of human-centered, effective, and timely breastfeeding education.

Family Management of Severe Obesity in Adolescents.

PURPOSE: Severe obesity, defined as a body mass index (BMI) ≥120th percent of the 95th BMI percentile for age and sex, is the fastest growing subcategory of obesity among youth, yet little is known about how this group understands and incorporates weight management strategies. The aims of this study were to explore how parents and adolescents understand severe obesity and incorporate management into their daily lives and evaluate the applicability of the Family Management Styles Framework (FMSF) to better understand the impact of severe obesity for adolescents. DESIGN AND METHODS: Directed content analysis grounded in a modified version of the FMSF was used to analyze one-time in-home face-to-face interviews with adolescents aged 12-17 years (N = 14) who received pediatric weight management care and a parent (N = 17). RESULTS: Both adolescents and parents described the day-to-day management as challenging and impactful to parent-child and sibling relationships. They described the need for sustained support and coaching in meeting daily physical activity requirements and related stories of weight stigma experienced. Further, parents' and adolescents' views were mostly congruent, except in their view of effectiveness of daily routines and how family attitudes and actions did or did not support the adolescent. CONCLUSIONS: The FMSF was successfully applied to understand family management of adolescents with severe obesity. These adolescents have complex physical and psychological needs impacting effective weight management and family life. PRACTICE IMPLICATIONS: Technology interventions should be considered to improve physiological and psychological outcomes for youth with severe obesity.

Prepregnancy Obesity Does Not Impact Placental Iron Trafficking.

BACKGROUND: Iron is critical for fetal development. Neonates of obese women may be at risk for poor iron status at birth as a result of maternal inflammation-driven overexpression of hepcidin. OBJECTIVES: The objective of this study was to determine differences in placental transfer of oral iron (57Fe) and expression of placental transferrin receptor 1 (TFR1) and ferroportin (FPN) mRNA and protein and their association with maternal and neonatal iron-related parameters, including maternal hepcidin, among women with and without prepregnancy (PP) obesity. METHODS: 57Fe ingested during the third trimester of pregnancy was recovered in venous umbilical cord blood among 20 PP obese [BMI (in kg/m2): 30.5-43.9] and 22 nonobese (BMI: 18.5-29.0) women aged 17-39 y. Placental TFR1 and FPN mRNA and protein expression were quantified via qPCR and Western blot. Maternal and neonatal markers of iron status and regulation, as well as inflammation, were measured. Descriptive and inferential statistical tests (e.g., Student t test, Pearson correlation) were used for data analysis. RESULTS: There was no difference in cord blood enrichment of 57Fe or placental mRNA or protein expression of TFR1 or FPN among the women with and without PP obesity. Maternal hepcidin was not correlated with cord blood enrichment of 57Fe or placental FPN mRNA or protein expression. Maternal log ferritin (corrected for inflammation) was inversely correlated with log percent enrichment of 57Fe in cord blood (partial r = -0.50; P < 0.01, controlled for marital status) and protein expression of TFR1 (r = -0.43; P = 0.01). CONCLUSIONS: Placental iron trafficking did not differ among women with and without PP obesity. Findings reinforce the importance of maternal iron stores in regulating placental iron trafficking.

Perinatal granulopoiesis and risk of pediatric asthma.

There are perinatal characteristics, such as gestational age, reproducibly associated with the risk for pediatric asthma. Identification of biologic processes influenced by these characteristics could facilitate risk stratification or new therapeutic targets. We hypothesized that transcriptional changes associated with multiple epidemiologic risk factors would be mediators of pediatric asthma risk. Using publicly available transcriptomic data from cord blood mononuclear cells, transcription of genes involved in myeloid differentiation was observed to be inversely associated with a pediatric asthma risk stratification based on multiple perinatal risk factors. This gene signature was validated in an independent prospective cohort and was specifically associated with genes localizing to neutrophil-specific granules. Further validation demonstrated that umbilical cord blood serum concentration of PGLYRP-1, a specific granule protein, was inversely associated with mid-childhood current asthma and early-teen FEV1/FVCx100. Thus, neutrophil-specific granule abundance at birth predicts risk for pediatric asthma and pulmonary function in adolescence.

A Scoping Review: Family and Child Perspectives of Clinic-Based Obesity Treatment.

PROBLEM: Interventions for children with obesity lead to only modest improvements in BMI and long-term outcomes, and data are limited on the perspectives of families of children with obesity in clinic-based treatment. This scoping review seeks to answer the question: What is known about the perspectives of families and children who receive care in clinic-based child obesity treatment? ELIGIBILITY CRITERIA: Studies were eligible for inclusion in this review that 1) reported parent, family or child perspectives of obesity treatment; 2) addressed concepts identified in the obesity literature as barriers or facilitators to success in obesity treatment from the perspective of the parent/family/child, including reasons for failure to return to clinic and satisfaction with care. SAMPLE: Twelve studies qualified for final inclusion in this scoping review RESULTS: Families report a lack of interventions tailored to their unique needs and resources. Barriers and facilitators encompass 1) structural issues (e.g., clinic location and scheduling); 2) financial issues; 3) patient and family issues; and 4) personal behaviors, motivation, and expectations. CONCLUSION: Data are lacking on the clinic-based treatment of children with severe obesity, and few studies report on non-maternal perspectives. IMPLICATIONS: Clinical practice must be tailored to individual family needs. Future research should concentrate on identifying missing variables which impact successful treatment outcomes through more rigorous qualitative studies, standardized outcome measures, focus on children with severe obesity, and fathers' and siblings' perspectives.

The Role of the Gut Microbiota in the Prevention and Management of Gestational Diabetes Mellitus: Are We There Yet?

Current nonpharmacological approaches, including diet and exercise interventions, for preventing and treating gestational diabetes mellitus are effective for less than 50% of women. Recent evidence suggests that the gut microbiome is integrally involved in maternal glucose homeostasis. Changes to the composition and metabolic behavior of the gut microbiota may play a role in the development and persistence of gestational diabetes mellitus. Thus, there is growing interest in targeting the maternal gut microbiome for preventing and managing pregnancy-related diseases including gestational diabetes mellitus. Future progress may come from a systems biology approach to elucidate the role of the gut microbiota in maternal glucose homeostasis.

Prepregnancy Obesity Is Not Associated with Iron Utilization during the Third Trimester.

BACKGROUND: An adequate maternal iron supply is crucial for maternal red blood cell (RBC) expansion, placental and fetal growth, and fetal brain development. Obese women may be at risk for poor iron status in pregnancy due to proinflammatory-driven overexpression of hepcidin leading to decreased iron bioavailability. OBJECTIVE: The objective of this study was to determine the impact of prepregnancy (PP) obesity on third-trimester maternal iron utilization. DESIGN: Using the stable isotope 57Fe, we measured iron utilization in the third trimester in PP obese [BMI (in kg/m2): ≥30] and nonobese (BMI: 18.5-29.9) women. We also assessed iron status, hepcidin, inflammation, erythropoietin, dietary iron intake, and gestational weight gain. Descriptive and inferential statistical tests (e.g., Student t test, Pearson correlation) were used for data analysis. RESULTS: Fifty pregnant women (21 PP obese, 29 PP nonobese) were included. Mean age was 27.6 ± 6.8 y and mean gestational age at time of 57Fe administration was 32.7 ± 0.7 wk. Anemia (hemoglobin <11 g/dL for non-black and <10.2 g/dL for black women) affected 38% of women (43% PP obese compared with 35% PP nonobese; P = 0.55). Women with PP obesity had significantly higher C-reactive protein (8.5 compared with 3.4 mg/L, P = 0.0007) and total body iron corrected for inflammation (6.0 compared with 4.3 mg/kg, P = 0.04) compared with the nonobese women. There was no difference in serum hepcidin or iron utilization between the PP BMI groups. CONCLUSION: This is the first study to assess the impact of PP obesity on maternal iron utilization. We found no difference in iron utilization in the third trimester of pregnancy in women with and without PP obesity. Despite higher frequency of anemia, women with PP obesity had less depleted body iron stores, suggesting some degree of iron sequestration. This finding should be followed up and extended to understand effects on fetal iron bioavailability.

Effects of maternal iron status on placental and fetal iron homeostasis.

Iron deficiency is common worldwide and is associated with adverse pregnancy outcomes. The increasing prevalence of indiscriminate iron supplementation during pregnancy also raises concerns about the potential adverse effects of iron excess. We examined how maternal iron status affects the delivery of iron to the placenta and fetus. Using mouse models, we documented maternal homeostatic mechanisms that protect the placenta and fetus from maternal iron excess. We determined that under physiological conditions or in iron deficiency, fetal and placental hepcidin did not regulate fetal iron endowment. With maternal iron deficiency, critical transporters mediating placental iron uptake (transferrin receptor 1 [TFR1]) and export (ferroportin [FPN]) were strongly regulated. In mice, not only was TFR1 increased, but FPN was surprisingly decreased to preserve placental iron in the face of fetal iron deficiency. In human placentas from pregnancies with mild iron deficiency, TFR1 was increased, but there was no change in FPN. However, induction of more severe iron deficiency in human trophoblast in vitro resulted in the regulation of both TFR1 and FPN, similar to what was observed in the mouse model. This placental adaptation that prioritizes placental iron is mediated by iron regulatory protein 1 (IRP1) and is important for the maintenance of mitochondrial respiration, thus ultimately protecting the fetus from the potentially dire consequences of generalized placental dysfunction.