Construction of machine learning tools to predict threatened miscarriage in the first trimester based on AEA, progesterone and ß-hCG in China: a multicentre, observational, case-control study.

BACKGROUND: Endocannabinoid anandamide (AEA), progesterone (P4) and ß-human chorionic gonadotrophin (ß-hCG) are associated with the threatened miscarriage in the early stage. However, no study has investigated whether combing these three hormones could predict threatened miscarriage. Thus, we aim to establish machine learning models utilizing these three hormones to predict threatened miscarriage risk. METHODS: This is a multicentre, observational, case-control study involving 215 pregnant women. We recruited 119 normal pregnant women and 96 threatened miscarriage pregnant women including 58 women with ongoing pregnancy and 38 women with inevitable miscarriage. P4 and ß-hCG levels were detected by chemiluminescence immunoassay assay. The level of AEA was tested by ultra-high-performance liquid chromatography-tandem mass spectrometry. Six predictive machine learning models were established and evaluated by the confusion matrix, area under the receiver operating characteristic (ROC) curve (AUC), accuracy and precision. RESULTS: The median concentration of AEA was significantly lower in the healthy pregnant women group than that in the threatened miscarriage group, while the median concentration of P4 was significantly higher in the normal pregnancy group than that in the threatened miscarriage group. Only the median level of P4 was significantly lower in the inevitable miscarriage group than that in the ongoing pregnancy group. Moreover, AEA is strongly positively correlated with threatened miscarriage, while P4 is negatively correlated with both threatened miscarriage and inevitable miscarriage. Interestingly, AEA and P4 are negatively correlated with each other. Among six models, logistic regression (LR), support vector machine (SVM) and multilayer perceptron (MLP) models obtained the AUC values of 0.75, 0.70 and 0.70, respectively; and their accuracy and precision were all above 0.60. Among these three models, the LR model showed the highest accuracy (0.65) and precision (0.70) to predict threatened miscarriage. CONCLUSIONS: The LR model showed the highest overall predictive power, thus machine learning combined with the level of AEA, P4 and ß-hCG might be a new approach to predict the threatened miscarriage risk in the near feature.

The effects of exogenous oral micronized progesterone on first trimester aneuploidy screening markers in women with threatened miscarriage: a matched case control study.

OBJECTIVES: To evaluate the effect of using progesterone due to early vaginal bleeding on aneuploidy screening markers in the first trimester. MATERIAL AND METHODS: This case control study includes the pregnant women who applied to our clinic in order to have a screening test for Down syndrome in the weeks of 11°/7-136/7. The patients were divided into three groups. Self reported vaginal bleeding with progesterone therapy (Bl+, Prg+, n:70), Self reported vaginal bleeding without progesterone therapy (Bl+, Prg-, n:70) and as a control group pregnant women who had no vaginal bleeding. (NoBl, NoPrg, n:70). In all patients, free beta-human chorionic gonadotrophin (ß-hCG), pregnancy associated plasma protein-A (PAPP-A) levels and nuchal translucency (NT) thickness were analyzed. Mean MoMs of the markers were compared between three groups. RESULTS: In the two groups with vaginal bleeding (Bl+, Prg + and Bl+, Prg-) the free ß-Hcg MoM values were statistically higher (1.22 ± 0.72, 0.98 ± 0.45, respectively) compared to the No Bleeding/No Progesterone group (0.81 ± 0.52) (p ≤ 0.001, p ≤ .01, respectively). However, no significant difference was found between the free ß-hCG MoM value of women with Bl+, Prg + group (1.22 ± 0.72) and Bl+, Prg - group (0.98 ± 0.45). (p: .053, significance level limitation with Bonferroni correction p: .017). PAPP-A and NT thickness did not differ significantly between the groups. CONCLUSION: Our data did not find an association between the use of oral progesterone and any alternations in first trimester screening parameters. Regardless of the progesterone usage, vaginal bleeding in the first trimester pregnancies increased the free ß-hCG MoM values compared to pregnancies without vaginal bleeding during pregnancy.

Proceso de enfermería a embarazada con infección de vías urinarias y amenaza de aborto / A Nursing Process for a Pregnant Woman with Urinary Tract Infection and Threatened Miscarriage

Introducción: La infección de vías urinarias es recurrente en el embarazo y generadora de complicaciones. Objetivo: Presentar un plan de cuidados enfermero a una mujer con diagnóstico infección de vías urinarias y amenaza de aborto Métodos: Caso clínico de paciente admitida en unidad de Ginecología y Obstetricia del Hospital General de Teziutlán, Puebla, México, durante 2019. Siguiendo la lógica del proceso de enfermería, la valoración se fundamentó en los patrones funcionales de salud de Marjory Gordon. Fueron utilizadas las terminologías normalizadas de enfermería: Diagnósticos (NANDA.int). Resultados (NOC) e Intervenciones (NIC). Resultados: Se identificaron cuatro diagnósticos de enfermería: deterioro de la eliminación urinaria, gestión ineficaz de la propia salud, disposición para mejorar la nutrición y riesgo de alteración de la díada materno/fetal, este último diagnóstico principal. Además, un Resultado NOC (Conocimiento: Control de Infección), cuatro indicadores y la escala de nunca a siempre demostrado; cuatro Intervenciones NIC, con 19 actividades. La evaluación transitó desde 12 (puntuación inicial) a 19 (puntuación final), de 20 como puntuación diana. Conclusión: La integración de las taxonomías NANDA, NIC, NOC y los patrones funcionales de salud de Marjory Gordon permitió diseñar el plan de cuidado de la embarazada, fueron articulados diagnósticos, resultados e intervenciones de enfermería que favorecieron la relación enfermera-paciente-contexto sociocultural, para llevar el cuidado hasta una concepción sistémica que permita el seguimiento y control de la embarazada(AU)

Introduction: Urinary tract infection is recurrent in pregnancy and causes complications. Objective: To present a nursing care plan provided to a woman with a diagnosis of urinary tract infection and threatened miscarriage. Methods: Clinical case of a patient admitted to the gynecology and obstetrics unit of General Hospital of Teziutlán (Puebla, Mexico) during 2019. Following the logic of the nursing process, the assessment was based on Marjory Gordon's functional health patterns. The standard nursing terminologies were used: diagnostics (NANDA-I), outcomes (NOC) and interventions (NIC). Results: Four nursing diagnoses were identified: deterioration of urinary elimination, ineffective self-health management, willingness to improve nutrition, and risk for alterations in maternal-fetal dyad, the latter being the main diagnosis. In addition, a NOC outcome (knowledge: infection control), four indicators and the never-to-always scale upon demonstration, as well as four NIC interventions, with nineteen activities, were obtained. Evaluation ranged from twelve (initial score) to nineteen (final score), with twenty as target score. Conclusion: The integration of the NANDA, NIC and NOC taxonomies together with the Marjory Gordon's functional health patterns allowed the design of the pregnant woman's care plan, with an articulation between nursing diagnoses, outcomes and interventions, which favored the nurse-patient-sociocultural context relationship, up to considering care based on a systemic conception that allows monitoring and control of the pregnant woman(AU)

Does the fibrinogen/albumin ratio predict the prognosis of pregnancies with abortus imminens?

OBJECTIVES: To investigate the fibrinogen/albumin ratio (FAR) of pregnant women with abortus imminens (AI) and its prognostic value for predicting spontaneous abortion. METHODS: A total 102 early pregnancies, 52 had been diagnosed with AI and 50 ages and body mass index matched healthy control pregnant women were included in this prospective observational study conducted in the Research and Training Hospital, Balikesir University, Balikesir, Turkey between September 2019 and August 2020. Fibrinogen/albumin values were compared between AI and control group. RESULTS: The rate of spontaneous abortion in AI pregnancies was 26.9% in our study population. Fibrinogen/albumin ratio levels were higher in AI pregnancies than in controls (p=0.0088). The regression analysis have shown that the increased FAR value (odds ratio [OR]: 7.3116 [95% CI: 1.3119 to 40.7507]; p=0.0232) was an independent marker for spontaneous abortion prediction in AI pregnancies. CONCLUSION: Pregnancies with AI have increased levels of FAR compared to healthy pregnancies. Fibrinogen/albumin ratio is an independent marker for predicting spontaneous abortion.

Amniotic immune biomarkers as risk factors in women with different symptoms of threatened late miscarriage.

PROBLEM: To investigate risk factors that can help identify the possibility of pregnancy loss in threatened late miscarriage (TLM) patients with and without spontaneous uterine contractions. METHOD OF STUDY: Amniotic immune biomarkers (IL2ß receptor, IL6, IL8, IL10, IL1ß, and TNFα) were assayed, and "sludge" was assessed. Patients without intrauterine infections were treated and followed up until delivery, and pregnancy outcomes were recorded. The two groups were compared for the differences in biomarker levels and "sludge," and the independent associations of biomarkers, "sludge," and other maternal factors with late miscarriage were investigated. RESULTS: The amniotic levels of IL2ßR, IL8, and TNFα were higher in the group with contractions (P < .05). When considered alone, each of the six biomarkers was significantly associated with late miscarriage in the no-contractions group and four of these (IL8, IL10, IL1ß, and TNFα) in the contractions group (P < .05). Biomarker levels were correlated, and in multivariate Cox regression analysis, there was an independent effect only for IL8 in the no-contractions group (HR = 18.16, 95% CI: 5.75-57.43) and TNFα in the contractions group (HR = 4.11, 95% CI: 1.68-10.08). For patients with contractions, IL10, IL8, and IL1ß were different in those with and without "sludge," but no such difference was seen in the no-contractions group. CONCLUSION: For TLM patients without intrauterine infections, amniotic immune biomarkers differ between patients with different symptoms, not only for their levels but also for the impact of these biomarkers on the risk of late miscarriage. These findings suggest that the symptoms of TLM should be considered in the study of miscarriage risk.

The predictive value of serum cancer antigen 125 (CA125) levels on pregnancy outcome in threatened miscarriages.

Background Spontaneous miscarriages are common pregnancy complications which result in psychological and emotional burden in the affected women. It is therefore necessary to identify biomarkers that can predict pregnancy outcome in women with threatened miscarriages so as to assist in their counselling and management. Methods The study compared levels of maternal serum CA125 in 65 pregnancies with threatened miscarriages (study group) with 65 normal intrauterine pregnancies (control group) between 6 weeks and 19 weeks + 6 days gestation using an enzyme linked immunosorbent assay (ELISA) technique. Results The mean age of the study and control groups were 29.5 ± 0.14 years and 30.1 ± 0.14 years, respectively. The mean serum CA125 in the study group was 30.1 ± 1.1 IU/mL while that of the control group was 22.9 ± 1.2 IU/mL and this was statistically significant (P = 0.0001). The mean serum CA125 level in the women whose pregnancies were aborted (aborters) was 34.8 ± 1.4 IU/mL while the mean value among those whose pregnancies continued till term (non-aborters) was 27.3 ± 1.2 IU/mL. This was statistically significant (P = 0.001). Further analysis using CA125 ≥36.2 IU/mL (mean value of serum CA125 among aborters + 1 standard deviation) as a threshold for intrauterine pregnancies that eventually got aborted showed a sensitivity of 66.7%, specificity of 83.3%, positive predictive value of 55.6%, negative predictive value of 88.9% and the diagnostic effectiveness (accuracy) was 79.4%. Conclusion The measurement of serum CA125 is a useful predictor of pregnancy outcome in threatened miscarriages.

New thoughts in exploring the pathogenesis, diagnosis, and treatment of threatened abortion.

Threatened abortion is a common complication of pregnancy. Since the underlying mechanisms behind this condition are complicated, predicting and treating threatened abortion is a challenge for clinicians. Interestingly, a recent article in Bioscience Trends (Biosci Trends 2019; DOI: 10.5582/bst.2019.01111) revealed a higher, not lower, level of ꞵ-human chorionic gonadotropin (hCG) and estrogen during the first 6 weeks of pregnancy, suggesting a novel association between ꞵ-hCG, estrogen, and threatened abortion. Unfortunately, this study was limited by its small sample size, unconvincing trial design, and inadequate exploration of the underlying mechanisms. This low-quality evidence indicates that a higher level of ꞵ- hCG and estrogen is associated with threatened abortion. However, that work provided some new insights for further studies of threatened abortion.

First Trimester Bleeding: Evaluation and Management.

Approximately one-fourth of pregnant women will experience bleeding in the first trimester. The differential diagnosis includes threatened abortion, early pregnancy loss, and ectopic pregnancy. Pain and heavy bleeding are associated with an increased risk of early pregnancy loss. Treatment of threatened abortion is expectant management. Bed rest does not improve outcomes, and there is insufficient evidence supporting the use of progestins. Trends in quantitative ß subunit of human chorionic gonadotropin (ß-hCG) levels provide useful information when distinguishing normal from abnormal early pregnancy. The discriminatory level (1,500 to 3,000 mIU per mL) is the ß-hCG level above which an intrauterine pregnancy should be visible on transvaginal ultrasonography. Failure to detect an intrauterine pregnancy, combined with ß-hCG levels higher than the discriminatory level, should raise concern for early pregnancy loss or ectopic pregnancy. Ultrasound findings diagnostic of early pregnancy loss include a mean gestational sac diameter of 25 mm or greater with no embryo and no fetal cardiac activity when the crown-rump length is 7 mm or more. Treatment options for early pregnancy loss include expectant management, medical management with mifepristone and misoprostol, or uterine aspiration. The incidence of ectopic pregnancy is 1% to 2% in the United States and accounts for 6% of all maternal deaths. Established criteria should be used to determine treatment options for ectopic pregnancy, including expectant management, medical management with methotrexate, or surgical intervention.

Same-day confirmation of intrauterine pregnancy failure in women with first- and early second-trimester bleeding.

OBJECTIVE: To determine if alpha-fetoprotein (AFP) concentration in vaginal blood, in the setting of dissolved fetal tissue, is significantly higher than its concentration in the maternal serum. DESIGN: A prospective cohort study. SETTING: Medical center. PATIENT(S): Four groups of women were evaluated: 1) with missed/incomplete miscarriage with vaginal bleeding; 2) with threatened miscarriage; 3) with vaginal bleeding during cerclage placement; and 4) undergoing dilation and curettage (D&C). INTERVENTIONS(S): None. MAIN OUTCOME MEASURE(S): In each patient, AFP concentration in the vaginal blood or in the liquid component of the evacuated products of conception (POC; D&C group) was compared with the AFP concentration in the maternal serum. RESULT(S): The median (range) concentration ratios of AFP in vaginal blood (or POC) to AFP in maternal serum were 24.5 (5.1-8,620) and 957 (4.6-24,216) for the missed/incomplete (n = 30) and the D&C (n = 22) groups, respectively, whereas they were only 1.2 (0.4-13.4) and 1.01 (0.7-1.5) for the threatened miscarriage (n = 15) and cerclage (n = 9) groups, respectively. Receiver operating characteristic (ROC) analysis demonstrated 100% sensitivity and 86.7% specificity for the detection of the passage of fetal tissue (ratio 4.3, area under the ROC curve 0.96). CONCLUSION(S): Higher concentrations of AFP in vaginal blood than in maternal serum may indicate the presence of dissolved fetal tissue (i.e., confirming a failed pregnancy).

A randomized double-blind controlled trial of the use of dydrogesterone in women with threatened miscarriage in the first trimester: study protocol for a randomized controlled trial.

BACKGROUND: Miscarriage is a common complication of pregnancy occurring in 15-20 % of all clinically recognized pregnancies. Currently, there is still no good scientific evidence to support the routine use of progestogens for the treatment of threatened miscarriage because the existing studies were not large enough to show a significant difference and some of them were not randomized or double-blind. METHODS: This is a double-blind, randomized controlled trial. A total of 400 patients presenting with first-trimester threatened miscarriage will be enrolled. They will be randomized to take dydrogesterone 40 mg per os, followed by 10 mg per os three times a day or placebo until twelve completed weeks of gestation or 1 week after the bleeding has stopped, whichever is longer. The primary outcome is the percentage of miscarriage before 20 weeks of gestation. DISCUSSION: We postulate that the dydrogesterone therapy will significantly reduce the risk of miscarriage in women with threatened miscarriage. TRIAL REGISTRATION: This study is registered at ClinicalTrials.gov, NCT02128685 . Registered on 29 April 2014.

Does progesterone therapy increase nuchal translucency in women with threatened miscarriage?

OBJECTIVES: The effect of exogenous progesterone on fetal nuchal translucency (NT) has been proposed recently. In this study, we aimed to compare the thickness of NT of patients receiving and not receiving progesterone for threatened miscarriage. MATERIAL AND METHODS: This study was designed as a retrospective comparative study. Ninety five women treated with progesterone constituted the study group whereas 97 women who were not treated with progesterone constituted the control group. An ultrasonographic examination was performed on all of the women to measure NT. All patients were treated with oral micronized progesterone in the study group. The main parameters recorded for each woman were; age, body mass index (BMI), obstetrical characteristics, and gestational age at first examination, treatment duration of progesterone therapy, and results of combined and triple tests. RESULTS: A total of 192 pregnant women with threatened miscarriage were included in this study. The mean NT thickness was statistically significantly higher in the study group (p < 0.001), and mean serum level of human chorionic gonadotropin (hCG) was also higher in this group (p < 0.05). There was no statistically significant difference between groups in terms of age, BMI, and gestational age at first examination. ROC curve analysis demonstrated that only increased NT (area under the curve: 0.634, p = 0.005, 95% CI: 0.541-0.727) was a discriminative factor for women receiving progesterone for threatened miscarriage. Also there was a positive correlation between NT and treatment duration (r = 0.269; p < 0.001). CONCLUSIONS: We think that oral progesterone therapy may increase NT depending on treatment duration without causing abnormal prenatal screening test results.

Role of serum biomarkers in the prediction of outcome in women with threatened miscarriage: a systematic review and diagnostic accuracy meta-analysis.

BACKGROUND: Threatened miscarriage affects one in five women and is associated with significant emotional distress. The uncertainty around the prognosis of threatened miscarriage makes it equally challenging to the healthcare professionals. Various biochemical markers have been investigated in the past to predict the outcome of threatened miscarriage; however, the results have been conflicting. Therefore, we have conducted a systematic review and meta-analysis to determine the diagnostic accuracy of biochemical markers in predicting the outcome in women presenting with threatened miscarriage. METHODS: This is a systematic review and meta-analysis of prospective studies that investigated biochemical markers to determine outcomes for women with threatened miscarriage at 5-23 weeks gestational age. Electronic databases were searched up to June 2015 and study quality assessment was performed using QUADAS-2 (Quality Assessment for Diagnostic Accuracy Studies-2: A Revised Tool) for evaluating the diagnostic accuracy studies. Statistical analysis was performed using the Cochrane systematic review software. RESULTS: A total of 19 studies were included in the qualitative data synthesis of which 15 (including 1263 women) were eligible for the meta-analysis. The review highlights the role of biochemical markers serum progesterone, hCG, pregnancy associated plasma protein A, estradiol and cancer antigen 125 (CA 125) in the prediction of outcome in women with threatened miscarriage. Interestingly, serum CA 125 appears to be the most promising marker (n = 648 women in seven studies), whereas serum progesterone and hCG are less useful once fetal viability is established. The summary receiver operating characteristics for CA 125 showed a sensitivity of 90% (95% confidence interval (CI) 83-94%), specificity of 88% (95% CI 79-93%), positive likelihood ratio of 7.86 (95% CI 4.23-14.60) and negative likelihood ratio of 0.10 (95% CI 0.06-0.20). The inverse of negative likelihood ratio was 9.31 (95% CI 5-17.1) indicating that a negative test is likely to identify those who are likely to continue with the pregnancy. Serum estradiol was the next best marker with a sensitivity of 45% (95% CI 6-90%), a specificity of 87% (95% CI 81-92%), a positive likelihood ratio of 3.72 (95% CI 1.01-13.71) and a negative likelihood ratio of 0.62 (95% CI 0.20-1.84). CONCLUSIONS: In women with threatened miscarriage, serum CA 125 has high predictive value in identifying pregnancies that are 'likely to continue', whereas the most commonly used biomarkers of serum hCG and progesterone are not useful in predicting outcome of a pregnancy with a viable fetus. Other markers such as inhibin A and a combination of markers need to be investigated to hopefully improve the prediction of outcome in women with threatened miscarriage.

Influence of threatened miscarriage on pregnancy and early postpartum period: a case-control report.

OBJECTIVE: To evaluate the influence of threatened miscarriage on obstetric complications during pregnancy and early postpartum period. METHODS: In this case-control study, hospital records of 12,050 first-trimester patients between January 2011 and December 2012 at the Research and Educational Hospital in Ankara, Turkey, were used. Of the 12,050 patients, 481 threatened miscarriage patients were evaluated. The control group was formed by age- and body mass index-matched cases without first trimester bleeding. Abortion, intrauterine foetal demise, preterm birth, preeclampsia, antenatal haematoma, uterine atony placental abruption and low birth-weights were compared between the study and the control group. RESULTS: When compared with the control group, the risk of having a preterm birth (p = 0.014; OR: 1.95; 95% CI: 1.15-3.24), low-birth-weight infant (p = 0.001; OR: 2.33; 95% CI: 1.45-3.83) and abortion (p = 0.00; OR: 2.55; 95% CI: 1.62-3.91) increased in cases of threatened miscarriage. However, the risk of uterine atony was decreased (p = 0.006; OR: 0.09; 95% CI: 0.12-0.7) in the threatened miscarriage group when compared with the control group. Threatened miscarriage did not increase the risk of placenta praevia, placental abruption or intrauterine foetal demise. CONCLUSION: Increased complications after threatened miscarriage is probably due to the persistence of a triggering mechanism. As preterm birth and abortion rate increased, whilst uterine atony rate decreased, one of the mechanisms causing threatened miscarriage might be increased uterine contractility.

Maternal level of pregnancy-associated plasma protein A as a predictor of pregnancy failure in threatened abortion.

Threatened miscarriage is a common complication of pregnancy. Despite initial viability confirmation by ultrasound scan, some of these patients had further spontaneous abortion. A highly sensitive and specific biomarker would be useful to determine the outcome of pregnancy and to prevent emotional impact to these women. A prospective 14-month cohort study was conducted in the Obstetrics and Gynaecology Department of Universiti Kebangsaan Malaysia Medical Centre to determine whether low serum levels of pregnancy-associated plasma protein A (PAPP-A) measured in early pregnancy can predict the outcome of threatened abortion. 42 pregnant women between 6 to 22 weeks of gestation with threatened abortion and 40 controls were enrolled. Serum samples were collected at presentation and PAPP-A was assayed by electrochemiluminescent immunoassay technique. Pregnancies were followed-up until 22 weeks of gestations and the outcome documented. Nine patients (11%) developed spontaneous abortion and 73 patients (89%) had successful pregnancy. The median PAPP-A level was significantly lower in patients with spontaneous abortion compared to those who had successful pregnancies in the threatened abortion group: 0.78 MoM (0.41-1.00 MoM) vs 1.00 MoM (1.00-2.0 MoM) respectively (p < 0.05). The best sensitivity of 44% and specificity of 93% were obtained at the cut of value of 0.66 MoM (95% CI, 0.561-0.773). In conclusion, low PAPP-A value in threatened abortion women is associated with pregnancy failure, although the use of PAPP-A as a one-time single marker has limited value.

Ameaça de aborto: conduta baseada em evidências / Threatened miscarriage: conduct based on evidences

A ameaça de aborto é definida como sangramento vaginal, geralmente indolor, que ocorre na primeira metade da gravidez com concepto vivo sem dilatação cervical. Muitas intervenções são utilizadas para a ameaça de aborto espontâneo. Quando uma causa específica é identificada, o tratamento direcionado pode reduzir taxas de abortamento. No entanto, na maioria dos casos, a fisiopatologia permanece desconhecida. Intervenções inespecíficas como repouso no leito e ausência de relações sexuais, apesar de comumente aconselhadas pelos médicos, não têm comprovação de benefício. A didrogesterona, um derivado progestínico, parece reduzir o risco de abortamento. Esta revisão mostra a qualidade das evidências científicas e o grau de recomendação das várias condutas para o tratamento da ameaça de aborto, concluindo que ainda é necessário realizar outros ensaios clínicos maiores, placebo-controlados e randomizados sobre o tratamento da ameaça de aborto para definir a eficácia da maioria das intervenções

Threatened miscarriage is defined as a vaginal bleeding, usually painless, which occurs in the first half of viable pregnancy without cervical dilatation. Many interventions are used for threatened and recurrent miscarriage. When a specific cause is identified, directed treatment may reduce miscarriage rates. However, in the majority of cases, the pathophysiology remains unknown. Unspecific interventions, as bed rest and avoidance of sexual intercourse, though commonly advised, are of no proven benefit. Dydrogesterone, a progesterone derivative, may further reduce miscarriage rates. This review shows the scientific evidence and classification quality of several interventions for the treatment of threatened miscarriage. Larger, randomized and controlled trials on the treatment of threatened miscarriage are needed to support the majority of the interventions

Maternal and perinatal outcome in women with threatened miscarriage in the first trimester: a systematic review.

BACKGROUND: Threatened miscarriage is a common complication in the first trimester of pregnancy and is often associated with anxiety regarding pregnancy outcome. OBJECTIVE: We undertook a systematic review to explore the effects of threatened miscarriage in the first trimester on maternal and perinatal outcomes. SEARCH STRATEGY: An electronic literature search using MEDLINE and EMBASE, and bibliographies of retrieved primary articles. No language restrictions were applied. SELECTION CRITERIA: All studies analysing outcomes of first-trimester bleeding where viability was confirmed on ultrasound or the pregnancy continued beyond viability. DATA COLLECTION AND ANALYSIS: Two review authors independently selected studies and extracted data on study characteristics, quality and accuracy. Meta-analysis was performed using Review Manager software. MAIN OUTCOME MEASURES: The outcome was broadly categorised into maternal and perinatal outcomes. The chief maternal outcomes included pre-eclampsia/eclampsia or pregnancy-induced hypertension, antepartum haemorrhage, preterm prelabour rupture of membranes (PPROM) and mode of delivery. The perinatal outcomes evaluated were preterm delivery, low birthweight, intrauterine growth restriction, perinatal mortality, indicators of perinatal morbidity (Apgar scores and neonatal unit admission) and presence of congenital anomalies. MAIN RESULTS: Fourteen studies met the inclusion criteria. Women with threatened miscarriage had a significantly higher incidence of antepartum haemorrhage due to placenta praevia [odds ratio (OR) 1.62, 95% CI 1.19, 2.22] or antepartum haemorrhage of unknown origin (OR 2.47, 95% CI 1.52, 4.02) when compared with those without first-trimester bleeding. They were more likely to experience PPROM (OR 1.78, 95% CI 1.28, 2.48), preterm delivery (OR 2.05, 95% CI 1.76, 2.4) and to have babies with intrauterine growth restriction (OR 1.54, 95% CI 1.18, 2.00). First-trimester bleeding was associated with significantly higher rates of perinatal mortality (OR 2.15, 95% CI 1.41, 3.27) and low-birthweight babies (OR 1.83, 95% CI 1.48, 2.28). AUTHORS' CONCLUSIONS: Threatened miscarriage in the first trimester is associated with increased incidence of adverse maternal and perinatal outcome.

Management of threatened preterm delivery in France: a national practice survey (the EVAPRIMA study).

OBJECTIVES: To describe the management of threatened preterm delivery (TPD) in France 3 years after publication of the French guidelines and to analyse the factors of variation of the practices observed. DESIGN: Population-based study. SETTING: Representative sample of French maternity units. The study included 107 hospitals, accounting for 20% of all French maternity units. POPULATION: Women hospitalised for TPD during May 2005. METHODS: Cross-sectional national practice survey. RESULTS: Of the 734 admissions for TPD, 12.1% involved premature rupture of membranes and 12.9% were in utero transfers. Women admitted for TPD accounted for roughly 6% of all annual deliveries, regardless of the unit's level of care, and 42.4% of these women delivered preterm: none delivered before 32 weeks in level 1 maternity units, 11.6% in level 2 and 88.4% in level 3. Transvaginal cervical ultrasound was performed for 54.5% of the women with intact membranes. Tocolysis was administered in 87.1% of women with intact membranes, with 45.6% of such women receiving this intervention for longer than 48 hours. First-line tocolytics used were calcium channel blockers (53.7%), beta-agonists (34.7%) or atosiban (8.8%), but their distribution differed substantially according to level of care. Maintenance tocolysis was administered to 385 women (59.8%) with intact membranes. Of the women admitted before 34 weeks, 21.1% did not receive corticosteroids. CONCLUSIONS: Practices for the management of TPD vary widely and appear to depend on the level of care. Some practices appear less than optimal, especially those related to duration of tocolysis, maintenance tocolysis, antenatal corticosteroid and use of cervical ultrasound.

The detection of anti-beta2-glycoprotein I antibodies is associated with increased risk of pregnancy loss in women with threatened abortion in the first trimester.

OBJECTIVE: This study was designed to evaluate whether the detection of serum antiphospholipid autoantibodies may be useful in predicting pregnancy outcome in women with threatened abortion in the first trimester. STUDY DESIGN: A group of 77 pregnant women of between 8 and 12 weeks' gestation with vaginal bleeding was tested for serum antiphospholipid, lupus anticoagulants, anticardiolipin, antinuclear antibodies, and anti-beta2-glycoprotein I antibodies, and was followed up until the spontaneous end of pregnancy. A control group composed of 15 healthy women with uncomplicated gestation was tested contemporarily for the same antibody panel. RESULTS: Of the 77 patients with threatened abortion, 32 (41.5%) progressed to deliver at term and 45 (58.5%) experienced early pregnancy loss. Among the antibodies evaluated, only anti-beta2-glycoprotein I was significantly more frequent in those women whose pregnancy resulted in spontaneous abortion (22/45, 49%) than in those who progressed to term (6/32, 19%) or in the control group (2/15, 13%; p=0.004). This difference was specific to the IgM isotype (p=0.001). After adjustment by multivariate analysis, the odds ratio for pregnancy loss associated with a positive beta2-glycoprotein I antibody test was 5.18 (p=0.001). CONCLUSION: The detection of anti-beta2-glycoprotein I antibodies is associated with an increased risk of pregnancy loss in women with threatened abortion in the first trimester.