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BMC Pregnancy and Childbirth Mar 2021Pregnancy loss is common and several factors (e.g. chromosomal anomalies, parental age) are known to increase the risk of occurrence. However, much existing research...
BACKGROUND
Pregnancy loss is common and several factors (e.g. chromosomal anomalies, parental age) are known to increase the risk of occurrence. However, much existing research focuses on recurrent loss; comparatively little is known about the predictors of a first miscarriage. Our objective was to estimate the population-level prevalence of miscarriages and to assess the contributions of clinical, social, and health care use factors as predictors of the first detected occurrence of these losses.
METHODS
In this population-based cohort study, we used linked administrative health data to estimate annual rates of miscarriage in the Manitoba population from 2003 to 2014, as a share of identified pregnancies. We compared the unadjusted associations between clinical, social, and health care use factors and first detected miscarriage compared with a live birth. We estimated multivariable generalized linear models to assess whether risk factors were associated with first detected miscarriage controlling for other predictors.
RESULTS
We estimated an average annual miscarriage rate of 11.3%. In our final sample (n = 79,978 women), the fully-adjusted model indicated that use of infertility drugs was associated with a 4 percentage point higher risk of miscarriage (95% CI 0.02, 0.06) and a past suicide attempt with a 3 percentage point higher risk (95% CI -0.002, 0.07). Women with high morbidity were twice as likely to experience a miscarriage compared to women with low morbidity (RD = 0.12, 95% CI 0.09, 0.15). Women on income assistance had a 3 percentage point lower risk (95% CI -0.04, -0.02).
CONCLUSIONS
We estimate that 1 in 9 pregnant women in Manitoba experience and seek care for a miscarriage. After adjusting for clinical factors, past health care use and morbidity contribute important additional information about the risk of first detected miscarriage. Social factors may also be informative.
Topics: Abortion, Spontaneous; Adult; Causality; Female; Health Status; Humans; Live Birth; Manitoba; Patient Acceptance of Health Care; Pregnancy; Pregnant Women; Prevalence; Risk Factors; Social Factors; Women's Health
PubMed: 33673832
DOI: 10.1186/s12884-021-03682-z -
Journal of General Internal Medicine Aug 2020
Topics: Abortion, Induced; Abortion, Spontaneous; Female; Humans; Physicians; Pregnancy; Primary Health Care
PubMed: 32472493
DOI: 10.1007/s11606-020-05919-7 -
Acta Obstetricia Et Gynecologica... Jul 2023According to a precautionary principle, it is recommended that pregnant women and women trying to conceive abstain from alcohol consumption. In this dose-response... (Meta-Analysis)
Meta-Analysis Review
INTRODUCTION
According to a precautionary principle, it is recommended that pregnant women and women trying to conceive abstain from alcohol consumption. In this dose-response meta-analysis, we aimed to examine the association between alcohol consumption and binge drinking and the risk of miscarriage in the first and second trimesters.
MATERIAL AND METHODS
The literature search was conducted in MEDLINE, Embase and the Cochrane Library in May 2022, without any language, geographic or time limitations. Cohort or case-control studies reporting dose-specific effects adjusting for maternal age and using separate risk assessments for first- and second-trimester miscarriages were included. Study quality was assessed using the Newcastle-Ottawa Scale. This study is registered with PROSPERO, registration number CRD42020221070.
RESULTS
A total of 2124 articles were identified. Five articles met the inclusion criteria. Adjusted data from 153 619 women were included in the first-trimester analysis and data from 458 154 women in the second-trimester analysis. In the first and second trimesters, the risk of miscarriage increased by 7% (odds ratio [OR] 1.07, 95% confidence interval [CI] 0.96-1.20) and 3% (OR 1.03, 95% CI 0.99-1.08) for each additional drink per week, respectively, but not to a statistically significant degree. One article regarding binge drinking and the risk of miscarriage was found, which revealed no association between the variables in either the first or second trimester (OR 0.84 [95% CI 0.62-1.14] and OR 1.04 [95% CI 0.78-1.38]).
CONCLUSIONS
This meta-analysis revealed no dose-dependent association between miscarriage risk and alcohol consumption, but further focused research is recommended. The research gap regarding miscarriage and binge drinking needs further investigation.
Topics: Pregnancy; Female; Humans; Abortion, Spontaneous; Pregnancy Trimester, Second; Binge Drinking; Alcohol Drinking; Maternal Age
PubMed: 37221907
DOI: 10.1111/aogs.14566 -
BMJ Open Jan 2024Literature surrounding the association between antidepressant use during pregnancy and miscarriage is conflicting. We aimed to conduct a systematic review and... (Meta-Analysis)
Meta-Analysis
BACKGROUND
Literature surrounding the association between antidepressant use during pregnancy and miscarriage is conflicting. We aimed to conduct a systematic review and meta-analysis of studies among pregnant women regarding the association between exposure to antidepressants during pregnancy and the risk of miscarriage, compared with pregnant women not exposed to antidepressants.
DESIGN
We conducted a systematic review and meta-analysis of non-randomised studies.
DATA SOURCES
We searched Medline, Embase and PsychINFO up to 6 August 2023.
ELIGIBILITY CRITERIA AND OUTCOMES
Case-control, cohort and cross-sectional study designs were selected if they compared individuals exposed to any antidepressant class during pregnancy to comparator groups of either no antidepressant use or an alternate antidepressant.
DATA EXTRACTION AND SYNTHESIS
Effect estimates were extracted from selected studies and pooled using a random-effects meta-analysis. Risk of bias (RoB) was assessed using the Risk of Bias in Non-Randomised Studies of Interventions (ROBINS-I) tool, and heterogeneity assessed using the I statistic. Subgroup analyses were used to explore antidepressant classes and the impact of confounding by indication.
RESULTS
1800 records were identified from the search, of which 29 were included in the systematic review and meta-analysis. The total sample included 5 671 135 individuals. Antidepressant users initially appeared to have a higher risk of miscarriage compared with unexposed individuals from the general population (summary effect estimate: 1.24, 95% CI 1.18 to 1.31, I=69.2%; number of studies (n)=29). However, the summary estimate decreased when comparing against unexposed individuals with maternal depression (1.16, 1.04 to 1.31; I=58.6%; n=6), suggesting confounding by indication may be driving the association. 22 studies suffered from serious RoB, and only two of the 29 studies were deemed at moderate RoB.
CONCLUSIONS
After accounting for maternal depression, there is little evidence of any association between antidepressant use during pregnancy and miscarriage. Instead, the results indicate the biasing impact of confounding by indication.
Topics: Humans; Female; Pregnancy; Abortion, Spontaneous; Cross-Sectional Studies; Antidepressive Agents
PubMed: 38272551
DOI: 10.1136/bmjopen-2023-074600 -
International Journal of Environmental... Jul 2022(1) Background: Miscarriages occur in approximately 15-25% of all pregnancies. There is limited evidence suggesting an association between history of miscarriage and the...
(1) Background: Miscarriages occur in approximately 15-25% of all pregnancies. There is limited evidence suggesting an association between history of miscarriage and the development of diabetic and hypertensive disorders in women. This systematic review aims to collate the existing literature and provide up to date epidemiological evidence on the topic. (2) Methods: We will search CINAHL Plus, Ovid/EMBASE, Ovid/MEDLINE, ProQuest, PubMed, Scopus, Web of Science, and Google Scholar, using a combination of medical subject headings, keywords, and search terms, for relevant articles related to the association between miscarriage and the risk of diabetic and hypertensive disorders. Cross-sectional, case-control, nested case-control, case-cohort, and cohort studies published from inception to April 2022 will be included in the search strategy. Three reviewers will independently screen studies and the risk of bias will be assessed using the Joanna Briggs Institute Critical Appraisal tool. Where the data permit, a meta-analysis will be conducted. (3) Results: The results of this systematic review will be submitted to a peer-reviewed journal for publication. (4) Conclusions: The findings of this systematic review will instigate efforts to manage and prevent reproductive, cardiovascular, and metabolic health consequences associated with miscarriages.
Topics: Abortion, Spontaneous; Cross-Sectional Studies; Diabetes Mellitus; Female; Humans; Hypertension, Pregnancy-Induced; Meta-Analysis as Topic; Pregnancy; Research Design; Systematic Reviews as Topic
PubMed: 35886173
DOI: 10.3390/ijerph19148324 -
Ugeskrift For Laeger Dec 2020Night work has been associated with sleep disorders as well as cardiovascular, endocrinologic, metabolic and immunological disturbances as shown in this review. Several... (Review)
Review
Night work has been associated with sleep disorders as well as cardiovascular, endocrinologic, metabolic and immunological disturbances as shown in this review. Several night shifts in a row and more than one night shift per week is associated with increased risk of pregnancy-related complications. A dose-response pattern has been shown between the number of night shifts during pregnancy and the risk of miscarriage, hypertensive disorders and sick leave. Individual risk assessment of pregnant night workers should focus on their general health, the intensity of night shifts and other adverse working conditions.
Topics: Abortion, Spontaneous; Female; Humans; Pregnancy; Pregnancy Complications; Sleep; Sleep Wake Disorders; Work Schedule Tolerance
PubMed: 33317690
DOI: No ID Found -
Journal of Women's Health (2002) Mar 2020Very little is known about early pregnancy loss in women with disabilities. To address this gap, we analyzed nationally representative data on miscarriage and receipt...
Very little is known about early pregnancy loss in women with disabilities. To address this gap, we analyzed nationally representative data on miscarriage and receipt of care focused on miscarriage prevention among women with and without disabilities. We used 2011-2015 National Survey of Family Growth data on women with at least one completed pregnancy within the past 5 years. Bivariate and multivariate analyses assessed the association of six disability categories (any, hearing, vision, cognitive, physical, independent living) with miscarriage occurrence and receipt of services intended to prevent miscarriage. Our analytic sample included 3,843 women with 5,776 completed pregnancies within the past 5 years. Overall, 31.63% of women with disabilities and 21.83% of women without disabilities had had a miscarriage within the past 5 years. Compared to women without disabilities, women with any, cognitive, physical, and independent living disability had higher adjusted odds of experiencing miscarriage (any disability aOR = 1.65 [95% CI: 1.21-2.25]). These women also had higher odds of receiving services to prevent miscarriage compared with women without disabilities (any disability aOR = 1.71 [95% CI: 1.20-2.45]). Among women who received services, higher proportions of women with any, vision, physical, or independent living disability received recommendations for bed rest (, 65.007% of women with independent living disability vs. 33.98% of women without disability, = 0.018). In a representative sample of U.S. women, we found significant differences in the odds of miscarriage and in receipt of care to prevent miscarriage between women with and without disabilities. Further research is needed to understand why women with disabilities are more likely to experience a miscarriage. Such research is important for informing care recommendations.
Topics: Abortion, Spontaneous; Adolescent; Adult; Disabled Persons; Female; Health Surveys; Humans; Pregnancy; United States; Young Adult
PubMed: 31750752
DOI: 10.1089/jwh.2019.7880 -
Human Reproduction (Oxford, England) Jan 2022Is fecundability associated with miscarriage history and future miscarriage risk?
STUDY QUESTION
Is fecundability associated with miscarriage history and future miscarriage risk?
SUMMARY ANSWER
Prior miscarriage was associated with lower fecundability, and participants with a history of subfertility (time-to-pregnancy (TTP) ≥12 months) were at a higher risk of subsequent miscarriage.
WHAT IS KNOWN ALREADY
Although miscarriage and low fecundability share common risk factors, prior studies have reported both lower and higher fecundability after miscarriage.
STUDY DESIGN, SIZE, DURATION
In this study, we examined two related associations: one, between miscarriage history and subsequent fecundability and, two, between fecundability and miscarriage risk in the subsequent pregnancy. The study is based on the Norwegian Mother, Father and Child Cohort Study (MoBa). In addition, the outcome of the pregnancy after the MoBa index pregnancy was obtained by linking information from three national health registries: the Medical Birth Registry of Norway, the Norwegian Patient Registry and the general practice database.
PARTICIPANTS/MATERIALS, SETTING, METHODS
We examined the association between number of prior miscarriages and fecundability in 48 537 naturally conceived, planned pregnancies in participants with at least one prior pregnancy. We estimated fecundability ratios (FRs) and 95% CIs using proportional probability regression. We further estimated the relative risk (RR) of miscarriage in the subsequent pregnancy as a function of TTP in the MoBa index pregnancy for 7889 pregnancies using log-binomial regression. Multivariable analyses adjusted for maternal age, pre-pregnancy maternal BMI, smoking status, cycle regularity, income level and highest completed or ongoing education.
MAIN RESULTS AND THE ROLE OF CHANCE
Fecundability decreased as the number of prior miscarriages increased. The adjusted FRs among women with one, two and three or more prior miscarriages were 0.83 (95% CI: 0.80-0.85), 0.79 (95% CI: 0.74-0.83) and 0.74 (95% CI: 0.67-0.82), respectively, compared with women with no prior miscarriages. Compared to women with a TTP of <3 months, the adjusted RR of miscarriage in the subsequent pregnancy was 1.16 (0.99-1.35) with TTP of 3-6 months, 1.18 (0.93-1.49) with TTP of 7-11 months and 1.43 (1.13-1.81) with TTP of 12 or more months.
LIMITATIONS, REASONS FOR CAUTION
Information on TTP and prior miscarriages was obtained retrospectively, and TTP was self-reported. MoBa is a pregnancy cohort, and findings may not be generalizable to all women. We were unable to examine the effect of changing partners between pregnancies, as well as other paternal factors such as seminal parameters. We also did not know what proportion of our participants had changed partners between their prior pregnancies and the index pregnancy. Furthermore, it is likely that many early miscarriages are not recognized.
WIDER IMPLICATIONS OF THE FINDINGS
The association between miscarriage and fecundability may reflect a contribution of occult pregnancy losses to TTP, as well as shared underlying causes for reduced fecundability and miscarriage.
STUDY FUNDING/COMPETING INTEREST(S)
The study was funded by the Research Council of Norway through its Medical Student Research Program funding scheme (project number 271555/F20), its Centres of Excellence funding scheme (project number 262700) and through the project 'Women's fertility - an essential component of health and well-being' (project number 320656). M.C.M. has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement number 947684). A.J.W. is supported by the Intramural Program of the National Institute of Environmental Health Sciences at the National Institutes of Health, USA. The authors report no competing interests.
TRIAL REGISTRATION NUMBER
N/A.
Topics: Abortion, Spontaneous; Cohort Studies; Fathers; Female; Humans; Male; Mothers; Pregnancy; Retrospective Studies; Risk Factors; Time-to-Pregnancy
PubMed: 34792121
DOI: 10.1093/humrep/deab252 -
International Journal of Environmental... May 2022The experience of miscarriage is an important population-level problem that affects approximately 10-25% of pregnancies. The physical consequences of miscarriage have...
The experience of miscarriage is an important population-level problem that affects approximately 10-25% of pregnancies. The physical consequences of miscarriage have been researched extensively, but psychological sequelae less so. First-person accounts show that women who have experienced miscarriage feel pressured to stay silent, to grieve, and to fight intense physical and psychological challenges alone. There is ample scientific evidence on the links between miscarriage and physical and mental health disorders, such as complicated grief, anxiety, depression, post-traumatic stress, suicidal risk, psychosomatic disorders, sexual health disorders, etc. However, there is a lack of deeper understanding of the specifics of psychological morbidity after miscarriage, as well as of the information on vulnerability and resilience factors. This study aims to assess the risk of postnatal depression and post-traumatic stress following miscarriage. A total of 839 Lithuanian women who had one or more miscarriages were asked to complete an online questionnaire, including the Edinburgh Postnatal Depression Scale (EPDS) and the Impact of Events Scale-Revised (IES-R). Of the women, 59.1% were found to be at increased risk of postnatal depression and 48.9% at high risk of postnatal depression; 44.7% of the women were considered to be at increased risk of post-traumatic stress. An impaired relationship with one's body and childlessness has been the strongest predictors of psychological morbidity risk.
Topics: Abortion, Spontaneous; Anxiety; Depression; Depression, Postpartum; Female; Humans; Pregnancy; Stress Disorders, Post-Traumatic; Stress, Psychological
PubMed: 35682100
DOI: 10.3390/ijerph19116515 -
Obstetrics and Gynecology Sep 2023To evaluate the association between seasonal influenza vaccination and miscarriage using data from an ongoing, prospective cohort study.
OBJECTIVE
To evaluate the association between seasonal influenza vaccination and miscarriage using data from an ongoing, prospective cohort study.
METHODS
We analyzed 2013-2022 data from PRESTO (Pregnancy Study Online), a prospective prepregnancy cohort study of female pregnancy planners and their male partners in the United States and Canada. Female participants completed a baseline questionnaire and then follow-up questionnaires every 8 weeks until pregnancy, during early and late pregnancy, and during the postpartum period. Vaccine information was self-reported on all questionnaires. Miscarriage was identified from self-reported information during follow-up. Male partners were invited to complete a baseline questionnaire only. We used Cox proportional hazard models to estimate the hazard ratio (HR) and 95% CI for the association between vaccination less than 3 months before pregnancy detection through the 19th week of pregnancy and miscarriage, with gestational weeks as the time scale. We modeled vaccination as a time-varying exposure and used propensity-score fine stratification to control for confounding from seasonal and female partner factors.
RESULTS
Of 6,946 pregnancies, 23.3% of female partners reported exposure to influenza vaccine before or during pregnancy: 3.2% during pregnancy (gestational age 4-19 weeks) and 20.1% during the 3 months before pregnancy detection. The miscarriage rate was 16.2% in unvaccinated and 17.0% among vaccinated participants. Compared with no vaccine exposure, influenza vaccination was not associated with increased rate of miscarriage when administered before (HR 0.99, 95% CI 0.81-1.20) or during (HR 0.83, 95% CI 0.47-1.47) pregnancy. Of the 1,135 couples with male partner vaccination data available, 10.8% reported vaccination less than 3 months before pregnancy. The HR for the association between male partner vaccination and miscarriage was 1.17 (95% CI 0.73-1.90).
CONCLUSION
Influenza vaccination before or during pregnancy was not associated with miscarriage.
Topics: Pregnancy; Humans; Male; Female; Infant, Newborn; Infant; Abortion, Spontaneous; Influenza, Human; Prospective Studies; Cohort Studies; Seasons; Influenza Vaccines
PubMed: 37535959
DOI: 10.1097/AOG.0000000000005279