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1.
Contemp Clin Trials Commun ; 36: 101218, 2023 Dec.
Article in English | MEDLINE | ID: mdl-37842321

ABSTRACT

Sickle cell disease (SCD) is a hemoglobin disorder and the most common genetic disorder that affects 100,000 Americans and millions worldwide. Adults living with SCD have pain so severe that it often requires opioids to keep it in control. Depression is a major global public health concern associated with an increased risk in chronic medical disorders, including in adults living with sickle cell disease (SCD). A strong relationship exists between suicidal ideation, suicide attempts, and depression. Researchers enrolling adults living with SCD in pragmatic clinical trials are obligated to design their methods to deliberately monitor and respond to symptoms related to depression and suicidal ideation. This will offer increased protection for their participants and help clinical investigators meet their fiduciary duties. This article presents a review of this sociotechnical milieu that highlights, analyzes, and offers recommendations to address ethical considerations in the development of protocols, procedures, and monitoring activities related to suicidality in depressed patients in a pragmatic clinical trial.

2.
J Integr Complement Med ; 29(10): 683-688, 2023 Oct.
Article in English | MEDLINE | ID: mdl-37184905

ABSTRACT

Objective: This study aimed to explore perspectives of people living with sickle cell disease (SCD) and SCD clinic providers and staff about the use of acupuncture and guided relaxation for treating chronic SCD pain. Data obtained were to inform an implementation blueprint for an effectiveness implementation clinical trial (GRACE Trial) testing whether acupuncture or guided relaxation reduces chronic pain when compared with usual care. Design: Qualitative research design. Methods: We conducted 33 semistructured interviews with people with SCD and SCD clinic providers and staff. Interviews were transcribed and coded. A deductive content analysis process was used to identify themes. Results: Four themes were identified: Receptivity to Acupuncture and Guided Relaxation, Limited Awareness, Complementary and Integrative Health (CIH) Therapy Preference, and Access Barriers. Both patients and clinic providers and staff were open to the use of acupuncture and guided relaxation for chronic pain treatment. After learning about these CIH therapies, some patients expressed a preference for one therapy over the other. They also discussed their ability to successfully engage with each therapy. There is a need to dispel misconceptions about the therapies by increasing understanding of how each therapy is implemented and functions to reduce pain. We identified several potential barriers that might affect the success of the trial and future health system integration, including time, transportation, and technology. Conclusion: This study is one of the first to present perspectives of both patients with SCD and clinic providers and staff on the use of acupuncture and guided relaxation for chronic SCD pain. Stakeholders' early input and perspectives highlighted that they welcome nonpharmacological CIH therapies. Implementation of a clinical trial and future health system integration will require the addressing misinformation and identifying strategies to overcome access barriers. Clinical trial registration number: NCT04906447.


Subject(s)
Acupuncture Therapy , Anemia, Sickle Cell , Chronic Pain , Complementary Therapies , Humans , Chronic Pain/therapy , Pain Management , Anemia, Sickle Cell/drug therapy
3.
Womens Health Issues ; 33(5): 560-565, 2023.
Article in English | MEDLINE | ID: mdl-37117090

ABSTRACT

INTRODUCTION: Although obtaining specific consent for examinations under anesthesia with learners is recommended by major professional organizations and mandated by many state laws and institutions, it is not practiced universally. We sought to investigate physicians' experiences using a formalized process to obtain consent from patients presenting for surgical abortions under anesthesia for pelvic examinations with learners. METHODS: Semistructured qualitative interviews were conducted with residents, fellows, and faculty who work or have rotated in a single family planning clinic after the clinic introduced this consent process. Participants were asked about their experiences obtaining informed consent from patients for examinations under anesthesia with learners. Interviews were audiorecorded, transcribed, and analyzed using modified grounded theory. All study procedures were institutional review board approved. RESULTS: Twenty interviews were performed, achieving thematic saturation, with 14 residents, 4 fellows, and 2 faculty members. Participants described initial discomfort with the consent process and their wording choices, which improved with increased familiarity and almost universal patient acceptance. Some participants felt that an informal training or practice before obtaining informed consent may have been helpful. Participants stressed the importance of this consent process to foster patient autonomy and choice. Participants reported that the fact that patients were presenting for abortion care did not influence their overall process or comfort level obtaining consent for pelvic examinations under anesthesia with learners; however, some noted that they gave patients more time to process the consent or used more intentional language during these encounters. CONCLUSIONS: Physicians desire and accept the integration of a formal consent process for examinations under anesthesia with learners at the time of abortion.


Subject(s)
Abortion, Induced , Anesthesia , Physicians , Pregnancy , Female , Humans , Informed Consent , Language
4.
Contemp Clin Trials Commun ; 32: 101076, 2023 Apr.
Article in English | MEDLINE | ID: mdl-36852100

ABSTRACT

Background: People with sickle cell disease frequently use complementary and integrative therapies to cope with their pain, yet few studies have evaluated their effectiveness. The 3-arm, 3-site pragmatic Hybrid Effectiveness-implementation Trial of Guided Relaxation and Acupuncture for Chronic Sickle Cell Disease Pain (GRACE) has 3 priorities: (1) evaluate guided relaxation and acupuncture to improve pain control; (2) determine the most appropriate and effective treatment sequence for any given patient based on their unique characteristics; and (3) describe the processes and structures required to implement guided relaxation and acupuncture within health care systems. Methods: Participants (N = 366) are being recruited and randomized 1:1:1 to one of 2 intervention groups or usual care. The acupuncture intervention group receives 10 sessions over approximately 5 weeks. The guided relaxation intervention group receives access to video sessions ranging from 2 to 20 min each viewed daily over 5 weeks. The usual care group receives the standard of clinical care for sickle cell disease. Participants are re-randomized at 6 weeks depending on their pain impact score. Assessments occur at 6 weeks, 12 weeks, and 24 weeks. The primary outcome is the change in pain impact score and secondary measures include opioid use, anxiety, depression, sleep, pain catastrophizing, substance use, global impression of change, constipation, and hospitalizations. The GRACE study uses the Consolidated Framework for Implementation Research to plan, execute, and evaluate the associated implementation processes. Conclusion: The results from GRACE will represent a critical step toward improving management of pain affecting patients with sickle cell disease.ClinicalTrials.gov Identifier: NCT04906447.

5.
Womens Health Rep (New Rochelle) ; 3(1): 652-660, 2022.
Article in English | MEDLINE | ID: mdl-35982776

ABSTRACT

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.

7.
J Nutr ; 151(9): 2646-2654, 2021 09 04.
Article in English | MEDLINE | ID: mdl-34132349

ABSTRACT

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.


Subject(s)
Iron , Placenta , Female , Ferritins , Fetal Blood/metabolism , Hepcidins/genetics , Hepcidins/metabolism , Humans , Infant, Newborn , Iron/metabolism , Obesity , Placenta/metabolism , Pregnancy , Pregnancy Trimester, Third
8.
PLoS One ; 16(6): e0252093, 2021.
Article in English | MEDLINE | ID: mdl-34106943

ABSTRACT

A singular focus on maternal health at the time of a pregnancy leaves much about perinatal mortality unexplained, especially when there is growing evidence for maternal early life effects. Further, lumping stillbirth and early neonatal death into a single category of perinatal mortality may obscure different causes and thus different avenues of screening and prevention. The common marmoset monkey (Callithrix jacchus), a litter-bearing nonhuman primate, is an ideal species in which to study the independent effects of a mother's early life and adult phenotypes on pregnancy outcomes. We tested two hypotheses in 59 marmoset pregnancies at the Southwest National Primate Research Center and the Barshop Institute for Longevity and Aging Studies. We explored 1) whether pregnancy outcomes were predicted independently by maternal adult weight versus maternal litter size and birth weight, and 2) whether stillbirth and early neonatal death were differentially predicted by maternal variables. No maternal characteristics predicted stillbirth and no maternal adult characteristics predicted early neonatal death. In univariate Poisson models, triplet-born females had a significantly increased rate of early neonatal death (IRR[se] = 3.00[1.29], p = 0.011), while higher birth weight females had a decreased rate (IRR[se] = 0.89[0.05], p = 0.039). In multivariate Poisson models, maternal litter size remained an independent predictor, explaining 13% of the variance in early neonatal death. We found that the later in the first week those neonates died, the more weight they lost. Together these findings suggest that triplet-born and low birth weight females have distinct developmental trajectories underlying greater rates of infant loss, losses that we suggest may be attributable to developmental disruption of infant feeding and carrying. Our findings of early life contributions to adult pregnancy outcomes in the common marmoset disrupt mother-blaming narratives of pregnancy outcomes in humans. These narratives hold that the pregnant person is solely responsible for pregnancy outcomes and the health of their children, independent of socioecological factors, a moralistic framing that has shaped clinical pregnancy management. It is necessary to differentiate temporal trajectories and causes of perinatal loss and view them as embedded in external processes to develop screening, diagnostic, and treatment tools that consider the full arc of a mother's lived experience, from womb to womb and beyond.


Subject(s)
Birth Weight , Callithrix , Litter Size , Animals , Female , Humans , Male , Perinatal Death , Pregnancy , Risk Factors , Stillbirth/veterinary
9.
J Urol ; 206(5): 1240-1247, 2021 11.
Article in English | MEDLINE | ID: mdl-34184922

ABSTRACT

PURPOSE: We aimed to understand the reasons patients choose to pursue third-line overactive bladder (OAB) therapy. MATERIALS AND METHODS: We conducted a mixed methods study that included patient interviews and survey data. Eligible patients were diagnosed by symptoms, had tried behavioral modifications, and OAB medications enrolled from October 2018 to August 2019. In addition to interviews, patients completed 4 surveys: the Pelvic Floor Distress Inventory, Overactive Bladder Questionnaire Short Form, Life Orientation Test-Revised, and a patient confidence in the health care system survey. Qualitative interview data were analyzed thematically. Logistic regression and chi-square analysis was used to analyze survey data. RESULTS: A total of 69 patients were consented, 4 withdrew, and 51 completed both interview and survey data. Overall 55% of patients were Caucasian, 45% were African American, and their average age was 71 (SD=10.4); 75% intended to pursue third-line OAB therapy and 31 (61%) expressed interest in a specific third-line therapy. Major interview themes included a desire for a better quality of life, embarrassment with accidents, and problems with medication. Themes leading patients away from third-line OAB treatment included concern about invasiveness and side effects of treatments, and restrictions to accessing care. CONCLUSIONS: Most patients desired to progress to third-line OAB therapy, were motivated by embarrassment, but were concerned about treatment side effects. We found that economic burden of OAB treatment is associated with patient interest in and decision to receive third-line therapies to include onabotulinumtoxinA and percutaneous tibial nerve stimulation. Improved quality of life, medication frustration, and concerns about side effects of further therapy are themes patients identified when patients considered third-line overactive bladder therapy.


Subject(s)
Cost of Illness , Patient Acceptance of Health Care/psychology , Quality of Life , Urinary Bladder, Overactive/therapy , Aged , Aged, 80 and over , Decision Making , Female , Health Expenditures/statistics & numerical data , Humans , Middle Aged , Patient Acceptance of Health Care/statistics & numerical data , Patient Preference , Perception , Qualitative Research , Treatment Outcome , Urinary Bladder, Overactive/diagnosis , Urinary Bladder, Overactive/economics , Urinary Bladder, Overactive/psychology
10.
J Am Heart Assoc ; 10(5): e018526, 2021 02.
Article in English | MEDLINE | ID: mdl-33619970

ABSTRACT

Background Preeclampsia is a prominent risk factor for long-term development of cardiovascular disease. Although existing studies report a strong correlation between preeclampsia and heart failure, the underlying mechanisms are poorly understood. One possibility is the glycoprotein growth factor activin A. During pregnancy, elevated activin A levels are associated with impaired cardiac global longitudinal strain at 1 year, but whether these changes persist beyond 1 year is not known. We hypothesized that activin A levels would remain increased more than 1 year after a preeclamptic pregnancy and correlate with impaired cardiac function. Methods and Results To test our hypothesis, we performed echocardiograms and measured activin A levels in women approximately 10 years after an uncomplicated pregnancy (n=25) or a pregnancy complicated by preeclampsia (n=21). Compared with women with a previously normal pregnancy, women with preeclampsia had worse global longitudinal strain (-18.3% versus -21.3%, P=0.001), left ventricular posterior wall thickness (0.91 mm versus 0.80 mm, P=0.003), and interventricular septal thickness (0.96 mm versus 0.81 mm, P=0.0002). Women with preeclampsia also had higher levels of activin A (0.52 versus 0.37 ng/mL, P=0.02) and activin/follistatin-like 3 ratio (0.03 versus 0.02, P=0.04). In a multivariable model, the relationship between activin A levels and worsening global longitudinal strain persisted after adjusting for age at enrollment, mean arterial pressure, race, and body mass index (P=0.003). Conclusions Our findings suggest that both activin A levels and global longitudinal strain are elevated 10 years after a pregnancy complicated by preeclampsia. Future studies are needed to better understand the relationship between preeclampsia, activin A, and long-term cardiac function.


Subject(s)
Heart Diseases/etiology , Heart Ventricles/physiopathology , Myocardial Contraction/physiology , Postpartum Period/physiology , Pre-Eclampsia/physiopathology , Ventricular Function, Left/physiology , Activins/blood , Adult , Biomarkers/blood , Echocardiography , Female , Follow-Up Studies , Heart Diseases/diagnosis , Heart Diseases/physiopathology , Heart Ventricles/diagnostic imaging , Humans , Pre-Eclampsia/blood , Pre-Eclampsia/diagnosis , Pregnancy , Prognosis , Retrospective Studies , Time Factors
11.
J Am Heart Assoc ; 9(12): e015997, 2020 06 16.
Article in English | MEDLINE | ID: mdl-32495688

ABSTRACT

Background Approximately 60% of women have Stage B heart failure 1 year after a preeclamptic delivery. Emerging evidence suggests that the profibrotic growth factor activin A, which has been shown to induce cardiac fibrosis and hypertrophy, is elevated in preeclampsia and may be inhibited by aspirin therapy. We hypothesized that preeclamptic women receiving aspirin would have lower activin A levels and reduced global longitudinal strain (GLS), a sensitive measure of cardiac dysfunction, than women who do not receive aspirin. To test our hypothesis, we performed a cohort study of women with preeclampsia or superimposed preeclampsia and compared activin A levels and GLS in parturients who did or did not receive aspirin. Methods and Results Ninety-two parturients were enrolled, of whom 25 (27%) received aspirin (81 mg/day) therapy. GLS, plasma activin A, and follistatin, which inactivates activin A, were measured. Women receiving aspirin therapy had lower median (interquartile range) levels of activin A (8.17 [3.70, 10.36] versus 12.77 [8.37, 31.25] ng/mL; P=0.001) and lower activin/follistatin ratio (0.59 [0.31, 0.93] versus 1.01 [0.64, 2.60] P=0.002) than women who did not receive aspirin, which also remained significant after multivariable analysis. Furthermore, GLS was worse in patients who did not receive aspirin (-19.84±2.50 versus -17.77±2.60%; P=0.03) despite no differences in blood pressure between groups. Conclusions Our study suggests that antepartum aspirin therapy reduced serum activin A levels and improved GLS in preeclamptic patients, suggesting that aspirin may mitigate the postpartum cardiac dysfunction seen in women with preeclampsia.


Subject(s)
Activins/blood , Aspirin/administration & dosage , Pre-Eclampsia/blood , Pre-Eclampsia/physiopathology , Prenatal Care , Ventricular Function, Left/drug effects , Adult , Aspirin/adverse effects , Biomarkers/blood , Down-Regulation , Drug Administration Schedule , Female , Follistatin/blood , Follistatin-Related Proteins/blood , Humans , Pre-Eclampsia/diagnosis , Pregnancy , Prospective Studies , Time Factors , Treatment Outcome , Young Adult
12.
J Nutr ; 150(6): 1397-1404, 2020 06 01.
Article in English | MEDLINE | ID: mdl-32221605

ABSTRACT

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.


Subject(s)
Iron/metabolism , Obesity/metabolism , Pregnancy Trimester, Third , Adult , Biological Availability , Female , Hepcidins/blood , Humans , Iron Isotopes/metabolism , Pregnancy , Young Adult
13.
Am J Physiol Regul Integr Comp Physiol ; 314(5): R684-R692, 2018 05 01.
Article in English | MEDLINE | ID: mdl-29412686

ABSTRACT

Animal models have been critical in building evidence that the prenatal experience and intrauterine environment are capable of exerting profound and permanent effects on metabolic health through developmental programming of obesity. However, despite physiological and evolutionary similarities, nonhuman primate models are relatively rare. The common marmoset monkey ( Callithrix jacchus) is a New World monkey that has been used as a biomedical model for well more than 50 years and has recently been framed as an appropriate model for exploring early-life impacts on later health and disease. The spontaneous, multifactorial, and early-life development of obesity in the common marmoset make it a valuable research model for advancing our knowledge about the role of the prenatal and placental mechanisms involved in developmental programming of obesity. This paper provides a brief overview of obesity in the common marmoset, followed by a discussion of marmoset reproduction and placental characteristics. We then discuss the occurrence and utility of variable intrauterine environments in developmental programming in marmosets. Evidence of developmental programming of obesity will be given, and finally, we put forward future directions and innovations for including the placenta in developmental programming of obesity in the common marmoset.


Subject(s)
Animal Nutritional Physiological Phenomena , Callithrix , Child Nutritional Physiological Phenomena , Nutritional Status , Pediatric Obesity/etiology , Placenta/physiopathology , Prenatal Exposure Delayed Effects , Adiposity , Adolescent , Age Factors , Animals , Child , Child, Preschool , Disease Models, Animal , Energy Metabolism , Female , Humans , Infant , Infant, Newborn , Male , Pediatric Obesity/metabolism , Pediatric Obesity/physiopathology , Pregnancy , Risk Factors
14.
Womens Health Issues ; 26(3): 298-304, 2016.
Article in English | MEDLINE | ID: mdl-26897655

ABSTRACT

BACKGROUND: In Alabama, more than one-half of reproductive-aged women live in counties without an abortion provider. State regulations require in-person counseling (or confirmed receipt of materials sent by certified mail) followed by a 48-hour waiting period. We explored the impact of this service and policy environment on experiences accessing abortion care for women traveling long distances to clinics. METHODS: We conducted in-depth interviews with 25 women who traveled more than 30 miles to an Alabama clinic providing abortion care between July and September 2014. Women were interviewed by telephone at least 1 day after their consultation, procedure, or follow-up visit. We used content analysis methods to code and analyze interview transcripts. FINDINGS: Almost all women found a clinic by searching online or talking to others in their social networks who had abortions. These strategies did not always direct women to the closest clinic, and some described searches that yielded inaccurate information. The majority of women did not believe an in-person consultation visit was necessary and found it to be burdensome because of the extra travel required and long waits at the clinic. Two-thirds of the women were unable to schedule their abortion 48 hours later owing to work schedules or because appointments were offered only once a week, and four women were delayed until their second trimester even though they sought services earlier in pregnancy. CONCLUSIONS: It is often difficult for women in communities without an abortion provider to find and access timely abortion care. Efforts are needed to make abortion more accessible and prevent further restrictions on services.


Subject(s)
Abortion Applicants/psychology , Abortion, Induced/statistics & numerical data , Ambulatory Care Facilities , Health Services Accessibility , Outcome Assessment, Health Care , Travel , Adult , Female , Gestational Age , Humans , Interviews as Topic , Legislation as Topic , Pregnancy , Qualitative Research , Young Adult
15.
PLoS One ; 9(5): e96845, 2014.
Article in English | MEDLINE | ID: mdl-24871614

ABSTRACT

BACKGROUND: The impact of the intrauterine environment on the developmental programming of adult female reproductive success is still poorly understood and potentially underestimated. Litter size variation in a nonhuman primate, the common marmoset monkey (Callithrix jacchus), allows us to model the effects of varying intrauterine environments (e.g. nutrient restriction, exposure to male womb-mates) on the risk of losing fetuses in adulthood. Our previous work has characterized the fetuses of triplet pregnancies as experiencing intrauterine nutritional restriction. METHODOLOGY/PRINCIPAL FINDINGS: We used over a decade of demographic data from the Southwest National Primate Research Center common marmoset colony. We evaluated differences between twin and triplet females in the number of pregnancies they produce and the proportion of those pregnancies that ended in fetal loss. We found that triplet females produced the same number of total offspring as twin females, but lost offspring during pregnancy at a significantly higher rate than did twins (38% vs. 13%, p = 0.02). Regardless of their own birth weight or the sex ratio of the litter the experienced as fetuses, triplet females lost more fetuses than did twins. Females with a male littermate experienced a significant increase in the proportion of stillbirths. CONCLUSIONS/SIGNIFICANCE: These striking findings anchor pregnancy loss in the mother's own fetal environment and development, underscoring a "Womb to Womb" view of the lifecourse and the intergenerational consequences of development. This has important translational implications for understanding the large proportion of human stillbirths that are unexplained. Our findings provide strong evidence that a full understanding of mammalian life history and reproductive biology requires a developmental foundation.


Subject(s)
Abortion, Spontaneous/etiology , Animals, Laboratory , Callithrix/physiology , Fetal Development/physiology , Fetal Nutrition Disorders/physiopathology , Models, Biological , Animals , Birth Weight/physiology , Female , Litter Size/physiology , Pregnancy , Regression Analysis
16.
J Med Primatol ; 41(3): 158-62, 2012 Jun.
Article in English | MEDLINE | ID: mdl-22296111

ABSTRACT

BACKGROUND: Focus on the placenta as an agent of fetal development and offspring health outcomes is growing. Primate research facilities or zoos may collect and fix placental tissue for long-term storage, but little is known about the effects of formalin fixation on the non-human primate placenta. METHODS: We obtained 48 vervet monkey placentas from the St. Kitts Biomedical Research Foundation. We investigated via correlation coefficients and ANOVAs the effects of gestational age and original fresh weight on weight change due to fixation. We also used linear regression models to determine whether fixed tissue weight was predictive of fresh weight and gestational age. RESULTS: Although the vervet monkey placenta is described as bidiscoid, 14.6% of the placentas in this sample were fused into a single mass. A decrease in weight was the most common response to formalin fixation, with the greatest degree of loss experienced by the heaviest placentas (ANOVA, F=5.99, P=0.005). Gestational age was unrelated to weight change. Those placentas that increased in weight had the lowest fresh weights. Fixed weights significantly predicted both fresh weight and gestational age (r(2) =0.78, P<0.00001; r(2) =0.76, P<0.00001, respectively). CONCLUSIONS: This paper adds to a sparse literature on the vervet monkey placenta. That fixed placentas are excellent predictors of both fresh weight and gestational age suggests that banked tissue may be a valuable resource for reconstructing aspects of individual life history, although caution must be exercised given the variability of weight change as a function of original placental size.


Subject(s)
Chlorocebus aethiops/anatomy & histology , Placenta/anatomy & histology , Tissue Preservation/veterinary , Animals , Chlorocebus aethiops/physiology , Female , Gestational Age , Organ Size , Pregnancy
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