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Leiomyomas in Pregnancy and Spontaneous Abortion: A Systematic Review and Meta-analysis.
Sundermann AC, Velez Edwards DR, Bray MJ, Jones SH, Latham SM, Hartmann KE
(2017) Obstet Gynecol 130: 1065-1072
MeSH Terms: Abortion, Habitual, Abortion, Spontaneous, Adult, Female, Humans, Leiomyoma, Pregnancy, Pregnancy Complications, Neoplastic, Risk Factors, Uterine Neoplasms
Show Abstract · Added February 21, 2019
OBJECTIVE - To systematically review studies reporting the risk of spontaneous abortion among pregnant women of typical reproductive potential with and without uterine leiomyomas.
DATA SOURCES - We searched PubMed, EMBASE, Web of Science, and ClinicalTrials.gov for publications from January 1970 to December 2016.
METHODS OF STUDY SELECTION - We excluded studies that did not use imaging to uniformly document leiomyoma status of all participants, did not have a comparison group without leiomyomas, or primarily included women seeking care for recurrent miscarriage, infertility care, or assisted reproductive technologies.
TABULATION, INTEGRATION, AND RESULTS - Two authors independently reviewed eligibility, extracted data, and assigned overall quality ratings based on predetermined criteria. Of 1,469 articles identified, nine were eligible. Five enrolled general obstetric populations and four included women undergoing amniocentesis. In five studies in general obstetric populations that included 21,829 pregnancies (1,394 women with leiomyomas and 20,435 without), only one adjusted for potential confounders. This meta-analysis revealed no increase in risk of spontaneous abortion among those with leiomyomas compared with those without (11.5% compared with 8.0%; risk ratio 1.16, 95% CI 0.80-1.52). When bias from confounding was estimated for nonadjusted studies, the aggregate calculated risk ratio was 0.83 (95% CI 0.68-0.98).
CONCLUSION - Leiomyoma presence was not associated with increased risk of spontaneous abortion in an analysis of more than 20,000 pregnant women. Failure of prior studies to adjust for confounders may have led to the common clinical belief that leiomyomas are a risk factor for spontaneous abortion.
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MeSH Terms
Differentially expressed genes implicated in unexplained recurrent spontaneous abortion.
Lee J, Oh J, Choi E, Park I, Han C, Kim DH, Choi BC, Kim JW, Cho C
(2007) Int J Biochem Cell Biol 39: 2265-77
MeSH Terms: Abortion, Habitual, Adult, Blotting, Western, Cell Cycle, Cell Line, Cell Proliferation, Complement C4b-Binding Protein, Down-Regulation, Embryo Implantation, Endometrium, Extracellular Matrix Proteins, Female, Gene Expression Profiling, Glycoproteins, Histocompatibility Antigens, Humans, Membrane Proteins, Pregnancy, Receptor, Anaphylatoxin C5a, Receptors, Complement, Receptors, Retinoic Acid, Retinal Dehydrogenase, Reverse Transcriptase Polymerase Chain Reaction, Transfection, Up-Regulation
Show Abstract · Added April 7, 2010
Recurrent spontaneous abortion occurs in approximately 3% of women with diagnosed pregnancies. The etiology in approximately 40% of recurrent spontaneous abortion is unexplained. To elucidate unexplained recurrent spontaneous abortion at the molecular level, we systemically identified differentially expressed genes during implantation window period in unexplained recurrent spontaneous abortion and characterized their functions in a human endometrial cell line. Expression levels of implantation-related genes selected from previously reported, various microarray data were determined to identify differentially expressed genes between normal fertile and unexplained recurrent spontaneous abortion subjects by real-time quantitative RT-PCR. Of 29 implantation-related genes, the transcript levels of cellular retinoic acid binding protein 2 and olfactomedin 1 were higher, whereas that of complement component 4 binding protein alpha was lower in subjects with unexplained recurrent spontaneous abortion, compared to normal fertile subjects. A correlation was evident between the transcript and protein levels of complement component 4 binding protein alpha and cellular retinoic acid binding protein 2. Expression of cellular retinoic acid binding protein 2 was positively correlated with retinoic acid-related genes in normal fertile subjects, but no significant association was observed in unexplained recurrent spontaneous abortion subjects. In relation to complement component 4 binding protein alpha, C5a receptor protein level was significantly higher in subjects with unexplained recurrent spontaneous abortion. Stable expression of cellular retinoic acid binding protein 2 and olfactomedin 1 in a human endometrial cell line inhibited cell growth and induced cell accumulation in the S and G(2)-M phase fractions, but did not trigger apoptosis. This study represents the first systematic identification of differentially expressed genes in unexplained recurrent spontaneous abortion. Defective cell growth by the differentially expressed genes suggests their implication in implantation failure in women with unexplained recurrent spontaneous abortion.
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25 MeSH Terms
Predictors of vaginal bleeding during the first two trimesters of pregnancy.
Yang J, Savitz DA, Dole N, Hartmann KE, Herring AH, Olshan AF, Thorp JM
(2005) Paediatr Perinat Epidemiol 19: 276-83
MeSH Terms: Abortion, Habitual, Abortion, Induced, Adult, Age Factors, Female, Humans, Obstetric Labor, Premature, Placenta Diseases, Pregnancy, Pregnancy Complications, Cardiovascular, Pregnancy Trimester, First, Pregnancy Trimester, Second, Risk Factors, Smoking, Uterine Hemorrhage
Show Abstract · Added March 5, 2014
This study evaluates maternal age, race, cigarette smoking, prior spontaneous abortion, prior induced abortion, and prior preterm birth in relation to vaginal bleeding during the first two trimesters of pregnancy. Information on vaginal bleeding and predictors came from the Pregnancy, Infection, and Nutrition Study, which enrolled 2806 pregnant women at 24-29 weeks' gestation during 1995-2000 in central North Carolina, USA. Generalised estimating equations were applied to take into account repeated episodes of vaginal bleeding during pregnancy. Women with advanced maternal age and passive smoking exposure were more likely to experience more intense vaginal bleeding during pregnancy, as were women with prior preterm birth. More intense bleeding was also more likely to be reported among women with multiple prior spontaneous abortions or multiple prior induced abortions, but not among women with a single prior spontaneous or induced abortion. The combination of prior spontaneous and induced abortion showed a dose-response association with the occurrence of vaginal bleeding during pregnancy.
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15 MeSH Terms
Antiphospholipid antibodies: anticardiolipin and the lupus anticoagulant in systemic lupus erythematosus (SLE) and in non-SLE disorders. Prevalence and clinical significance.
Love PE, Santoro SA
(1990) Ann Intern Med 112: 682-98
MeSH Terms: Abortion, Habitual, Antibodies, Blood Coagulation Factors, Cardiolipins, Female, Hemorrhage, Humans, Immunochemistry, Lupus Coagulation Inhibitor, Lupus Erythematosus, Systemic, Nervous System Diseases, Phospholipids, Pregnancy, Thrombocytopenia, Thrombosis
Show Abstract · Added March 5, 2014
PURPOSE - To determine the prevalence of lupus anticoagulant and anticardiolipin in systemic lupus erythematosus (SLE) and in non-SLE disorders, and to evaluate the clinical significance of these autoantibodies as they relate to thromboembolic events, neuropsychiatric disorders, thrombocytopenia, and fetal loss.
DATA IDENTIFICATION - A computer-assisted search of the literature (MEDLINE, 1966 to 1989) and review of the bibliographies of all identified articles.
STUDY SELECTION - Series of ten or more subjects were included if the assays used for detecting lupus anticoagulant or anticardiolipin met the specified minimal criteria for validity.
DATA EXTRACTION - Series were categorized according to antibody type and underlying disease. A systematic appraisal of patient selection methods, study design, and assay methods was done.
RESULTS OF DATA ANALYSIS - An analysis of 29 published series (comprising over 1000 patients with SLE) yielded an average frequency of 34% for the lupus anticoagulant and 44% for anticardiolipin. Antiphospholipid antibodies are also prevalent in patients with various non-SLE disorders. In patients with SLE, a statistically significant association exists between the presence of either antibody and a history of thrombosis, neurologic disorders, or thrombocytopenia. The available data suggest, but do not firmly support, an association between antiphospholipid antibodies and history of fetal loss in women with SLE. Contrary to prevailing opinion, none of these associations have been shown conclusively in patients with non-SLE disorders.
CONCLUSIONS - The results of predominantly retrospective series suggest that for certain persons (patients with SLE or closely related disorders) antiphospholipid antibodies may be important risk factors for thrombosis, neurologic disease, thrombocytopenia, and fetal loss. Standardized tests for lupus anticoagulant and anticardiolipin, as well as long-term, prospective clinical studies, are needed to determine the prognostic value of antiphospholipid antibodies.
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15 MeSH Terms