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Introducción. La cesárea es uno de los procedimientos quirúrgicos más predominante a nivel mundial. En el Perú, con datos nacionales, muestran que nuestros valores oscilan en 36% y un factor prevalente en la indicación de parto por cesárea es la cesárea previa. Objetivo. Determinar la prevalencia de cesárea previa como indicación de parto por cesárea en un hospital peruano en el periodo de enero a diciembre del año 2022. Materiales y Métodos. Se realizó un estudio descriptivo a partir de la información de las historias clínicas de las gestantes con indicación de parto por cesárea atendidas en un hospital. De una población de 6100 gestantes atendidas en el 2022 se obtuvo un total de 236 historias clínicas de pacientes que se les realizó cesárea con antecedente de cesárea. Se extrajo información sociodemográfica y clínica. Resultados. Se encontró que la prevalencia de cesárea previa como indicación de parto por cesárea fue de un 21.6%. La edad media de las pacientes atendidas fue de 32.5 años, el grado de instrucción más prevalente fue de secundaria completa con un 57.6%, el 75.4% de pacientes fueron convivientes, finalmente el número de gestaciones prevalente que tuvieron estas pacientes fue dos. Conclusiones. Aproximadamente la quinta parte de las pacientes con indicación de parto por cesárea tuvieron la indicación por la cesárea previa. Palabras clave: Cesárea previa, indicación de cesárea, gestantes.

En condiciones de ayuno, se extrajeron muestras sanguíneas de 1,560 gestantes peruanas no diabéticas residentes a nivel del mar, en semana 26 a 36 de gestación a fin de establecer valores normales para la glicemia en ayunas en la gestación (método o-toluidina) y comprobar si el pronóstico materno-fatal variaba cuando los valores de glicenúa en ayunas (GA) se encontraban fuera de estos límites. Los percentiles 3, 50, 90 y 95 para GA fueron 50, 67, 80 y 85 mg/d~ respectivamente. Las gestantes con factores de riesgo para diabetes tuvieron GA significativamente mayores aquellas que no los tenían 68 ± 10 versus 66 ± 9 mg/dl, p < 0.02), Se siguió a 1,415 (90.7%) de las gestantes y a 1,043 (67%) de los recién nacidos. La GA mostró una asociación positiva con la presencia de factores de riesgo para diabetes, complicaciones obstétricas, cesárea por desproporción fetopélvica, distocia de hombro y morbi-mortalidad perinatal. Un incremento significativo en el riesgo materno-fetal ocurrió cuando la glicemia en ayunas se encontraba fuera de los límites SO - 79 mg,ldl (2.8 - 4.4 mmol/L). Valores de glicemia en ayunas fuera de estos límites debe considerarse como un indicador pronóstico de mayor riesgo obstétrico y perinatal.

Las competencias investigativas son el dominio de actitudes cognitivas puestas en prácticas por los estudiantes. El objetivo fue analizar la validez de constructo de una rúbrica analítica para evaluar las competencias investigativas de estudiantes de posgrado. Docentes asesores evaluaron 260 tesis mediante la rúbrica. El análisis de validez de constructo se efectuó mediante un proceso de validación cruzada entre el análisis factorial exploratorio, que es una técnica estadística que explora con precisión las dimensiones subyacentes de las variables latentes de las variables observadas y el análisis factorial comprobatorio, que encuadra los modelos de ecuaciones estructurales, analizando las relaciones entre los indicadores de las variables observadas y las variables latentes. Los resultados del análisis factorial exploratorio mostraron correspondencia con la propuesta teórica, donde un solo factor explicó el 51% de la varianza que fue representado por la totalidad de ítems. La evaluación de este modelo mediante el análisis factorial comprobatorio reveló un buen ajuste (X2/gl: 2.197; RMSA: 0,085; GFI: 0,902; CFI: 0,932; TLI: 0,912), y se encontró evidencia de validez convergente (CFE>0,50; CC: 0,902; VME: 0,464). La confiabilidad de la rúbrica fue óptima (α=0,903). Se concluye que el constructo formulado está representado en la estructura del instrumento.

Abstract Background Migraine, a common chronic-intermittent disorder of idiopathic origin characterized by severe debilitating headaches and autonomic nervous system dysfunction, and placental abruption, the premature separation of the placenta, share many common pathophysiological characteristics. Moreover, endothelial dysfunction, platelet activation, hypercoagulation, and inflammation are common to both disorders. We assessed risk of placental abruption in relation to maternal history of migraine before and during pregnancy in Peruvian women. Methods Cases were 375 women with pregnancies complicated by placental abruption, and controls were 368 women without an abruption. During in-person interviews conducted following delivery, women were asked if they had physician-diagnosed migraine, and they were asked questions that allowed headaches and migraine to be classified according to criteria established by the International Headache Society. Logistic regression procedures were used to calculate odds ratios (aOR) and 95% confidence intervals (CI) adjusted for confounders. Results Overall, a lifetime history of any headaches or migraine was associated with an increased odds of placental abruption (aOR = 1.60; 95% CI 1.16-2.20). A lifetime history of migraine was associated with a 2.14-fold increased odds of placental abruption (aOR = 2.14; 95% CI 1.22-3.75). The odds of placental abruption was 2.11 (95% CI 1.00-4.45) for migraineurs without aura; and 1.59 (95% 0.70-3.62) for migraineurs with aura. A lifetime history of tension-type headache was also increased with placental abruption (aOR = 1.61; 95% CI 1.01-2.57). Conclusions This study adds placental abruption to a growing list of pregnancy complications associated with maternal headache/migraine disorders. Nevertheless, prospective cohort studies are needed to more rigorously evaluate the extent to which migraines and/or its treatments are associated with the occurrence of placental abruption.

Objetivo: Describir los resultados de la biopsia prostática transperineal por fusión de la resonancia magnética cognitiva y ultrasonido en la detección del cáncer. Materiales y métodos: Estudio de serie de casos, retrospectivo, realizado en Clínica Delgado entre julio del 2019 y octubre del 2021. Se incluyó pacientes con examen digital de próstata y/o Antígeno Prostático Específico anormal e imágenes de Resonancia Magnética de próstata con lesiones categoría PI-RADS 4 o 5. Excluyendo a pacientes con trastorno de coagulación, lesiones rectales, imposibilidad para abducción, comorbilidades para anestesia. Registramos las características clínicas, demográficas, datos de antígeno prostático específico, volumen de la próstata, lesiones PI-RADS, tasas de cáncer, complicaciones. Resultados: Se evaluaron 18 pacientes, con edad media de 69,33 ± 7,67 años. La media del antígeno prostático específico de 14,94 ± 12,42 ng/mL. La media del volumen de próstata de 57,72 ± 28,68 cc. Al examen digital de la próstata 16/18 (88.88 %) pacientes tenían sospecha de cáncer. Biopsias en pacientes con lesiones PI-RADS 4 en 6/18 (33,33%) y 5 en 12/18 (66,67%). Biopsia con 19 núcleos a 6/18 (33,33%) y 16 núcleos a 12/18 (66,67%) pacientes. Pacientes con cáncer 15/18 (83,33%), todos Adenocarcinoma Acinar, con Gleason 6 en 2/18 (11,11%) y Gleason ≥ 7 en 13/18 (72,22%) pacientes. Complicaciones leves como hematuria 1/18 (5,6%), disuria terminal 8/18 (44,4%) y molestia perineal 7/18 (38,8%) y ninguna infecciosa. Conclusiones: la biopsia prostática transperineal por fusión de imágenes de resonancia magnética cognitiva y ultrasonido es factible, segura, con tasas altas de positividad y sin infecciones.

Purpose: Despite the call to increase the number of radiation oncologists in Latin America, the quality, similarity, and number of residency training programs are unknown. We seek to describe the current state of residency programs in radiation oncology in Latin America. Methods and Materials: Latin American Residents in Radiation Oncology performed a cross-sectional analysis of universities and training centers for radiation oncologists in Latin America. Latin American Residents in Radiation Oncology members identified and contacted current residents and specialists at each center to obtain information and documents that described their training curricula. Results: As of 2020, 13 of 23 (56.5%) Latin American countries have radiation oncology training. Seventy-three training centers were identified (59 active and 14 inactive), associated with 28 universities. On average, each active center trains 2.6 new residents per year, and in total, 156 residents are trained annually. The average length of training programs is 3.6 years. Brazil and Mexico comprise 31 (52.5%) and 7 (11.9%) of active programs, respectively, and 64 (41.8%) and 50 (32.7%) residents, respectively. Training is available in 38 cities in 13 countries, and outside Brazil and Mexico, only 13 cities in 11 countries (9 capitals and 4 noncapital cities). Individualized curriculum documents were provided by 20 (83.3%) of 24 non-Brazilian programs, while 1 standardized guideline was provided for Brazilian training programs. These demonstrated variation between subjects taught, their devoted time, outside specialty rotations, and experiences in modern techniques. Seventy-five percent include volumetric modulated arc therapy, 70% stereotactic radiosurgery, and 55% stereotactic body radiation therapy training. One-hundred percent include gynecologic brachytherapy education and

Objetivo. Evaluar las estrategias didácticas usadas en las sesiones de aprendizaje del área de comunicación para desarrollar el pensamiento crítico en estudiantes de educación secundaria de instituciones educativas de la jurisdicción de Ocros. El desarrollo del aprendizaje en el siglo XXI exige que sus estudiantes desarrollen altos niveles de pensamiento y creatividad, utilizando diversas estrategias pedagógicas por parte de la comunidad docente. Metodología. Se utilizaron los diseños cuantitativo y cualitativo, por lo tanto, este estudio se caracteriza por ser de naturaleza mixta; triangulándose no solo datos, eventos y entrevistas aisladas, sino también el análisis y la reflexión pedagógica. Se utilizaron los diseños cuantitativo y cualitativo, los cuales permiten analizar e inferir cómo los docentes de la provincia de Ocros-Huaraz-Perú desarrollan la gestión del aula. Resultados y conclusión. El pensamiento crítico, en sus tres subcategorías: razonamiento, argumentación y toma de decisiones, permite afirmar que los docentes presentan fuertes debilidades en su proceso de conducción de los aprendizajes y los estudiantes carecen de herramientas cognitivas que posibiliten realizar una lectura crítica.

Abstract Background The amniotic fluid (AF) cell-free transcriptome is modulated by physiologic and pathologic processes during pregnancy. AF gene expression changes with advancing gestation reflect fetal development and organ maturation; yet, defining normal expression and splicing patterns for biomarker discovery in obstetrics requires larger heterogeneous cohorts, evaluation of potential confounding factors, and novel analytical approaches. Methods Women with a normal pregnancy who had an AF sample collected during midtrimester (n = 30) or at term gestation (n = 68) were included. Expression profiling at exon level resolution was performed using Human Transcriptome Arrays. Differential expression was based on moderated t-test adjusted p 1.25; for differential splicing, a splicing index > 2 and adjusted p 0.79, p

OBJECTIVE:To predict spontaneous preterm birth among pregnant women in an African American population using first trimester peripheral blood maternal immune cell microRNA. STUDY DESIGN:This was a retrospective nested case-control study in pregnant patients enrolled between March 2006 and October 2016. For initial study inclusion, samples were selected that met the following criteria: 1) singleton pregnancy; 2) maternal body mass index (BMI)

ObjectiveAmniotic fluid cytokines have been implicated in the mechanisms of preterm labor and birth. Cytokines can be packaged within or on the surface of extracellular vesicles. The main aim of this study was to test whether the protein abundance internal to and on the surface of extracellular vesicles changes in the presence of sterile intra-amniotic inflammation and proven intra-amniotic infection in women with preterm labor as compared to the women with preterm labor without either intra-amniotic inflammation or proven intra-amniotic infection.Study designWomen who had an episode of preterm labor and underwent an amniocentesis for the diagnosis of intra-amniotic infection or intra-amniotic inflammation were classified into three groups: 1) preterm labor without either intra-amniotic inflammation or proven intra-amniotic infection, 2) preterm labor with sterile intra-amniotic inflammation, and 3) preterm labor with intra-amniotic infection. The concentrations of 38 proteins were determined on the extracellular vesicle surface, within the vesicles, and in the soluble fraction of amniotic fluid.Results1) Intra-amniotic inflammation, regardless of detected microbes, was associated with an increased abundance of amniotic fluid cytokines on the extracellular vesicle surface, within vesicles, and in the soluble fraction. These changes were most prominent in women with proven intra-amniotic infection. 2) Cytokine changes on the surface of extracellular vesicles were correlated with those determined in the soluble fraction; yet the magnitude of the increase was significantly different between these compartments. 3) The performance of prediction models of early preterm delivery based on measurements on the extracellular vesicle surface was equivalent to those based on the soluble fraction.ConclusionsDifferential packaging of amniotic fluid cytokines in extracellular vesicles during preterm labor with sterile intra-amniotic inflammation or proven intra-amniotic infection is reported herein for the first time. The current study provides insights into the biology of the intra-amniotic fluid ad may aid in the development of biomarkers for obstetrical disease.

BackgroundIn comparison to the non-pregnant state, the first trimester of pregnancy is characterized by systemic adaptation of the mother. The extent to which these adaptive processes are reflected in the maternal blood metabolome is not well characterized.ObjectiveTo determine the differences between the plasma metabolome of non-pregnant and pregnant women before 16 weeks gestation.Study designThis study included plasma samples from 21 non-pregnant women and 50 women with a normal pregnancy (8-16 weeks of gestation). Combined measurements by ultrahigh performance liquid chromatography/tandem mass spectrometry and by gas chromatography/mass spectrometry generated molecular abundance measurements for each sample. Molecular species detected in at least 10 samples were included in the analysis. Differential abundance was inferred based on false discovery adjusted p-values (FDR) from Mann-Whitney-Wilcoxon U tests ResultsOverall, 637 small molecules met the inclusion criteria and were tested for association with pregnancy; 44% (281/637) of small molecules had significantly different abundance, of which 81% (229/281) were less abundant in pregnant than in non-pregnant women. Eight percent (14/169) of the metabolites that remained significant in the adjusted analysis also changed as a function of gestational age. A pathway analysis revealed enrichment in steroid metabolites related to sex hormones, caffeine metabolites, lysolipids, dipeptides, and polypeptide bradykinin derivatives (all, FDR < 0.1).ConclusionsThis high-throughput mass spectrometry study identified: 1) differences between pregnant vs. non-pregnant women in the abundance of 44% of the profiled plasma metabolites, including known and novel molecules and pathways; and 2) specific metabolites that changed with gestational age.

ObjectivesTo identify maternal plasma protein markers for early preeclampsia (delivery Study designThis longitudinal case-control study included 90 patients with a normal pregnancy and 33 patients with early preeclampsia. Two to six maternal plasma samples were collected throughout gestation from each woman. The abundance of 1,125 proteins was measured using high-affinity aptamer-based proteomic assays, and data were modeled using linear mixed-effects models. After data transformation into multiples of the mean values for gestational age, parsimonious linear discriminant analysis risk models were fit for each gestational-age interval (8-16, 16.1-22, 22.1-28, 28.1-32 weeks). Proteomic profiles of early preeclampsia cases were also compared to those of a combined set of controls and late preeclampsia cases (n = 76) reported previously. Prediction performance was estimated via bootstrap.ResultsWe found that 1) multi-protein models at 16.1-22 weeks of gestation predicted early preeclampsia with a sensitivity of 71% at a false-positive rate (FPR) of 10%. High abundance of matrix metalloproteinase-7 and glycoprotein IIbIIIa complex were the most reliable predictors at this gestational age; 2) at 22.1-28 weeks of gestation, lower abundance of placental growth factor (PlGF) and vascular endothelial growth factor A, isoform 121 (VEGF-121), as well as elevated sialic acid binding immunoglobulin-like lectin 6 (siglec-6) and activin-A, were the best predictors of the subsequent development of early preeclampsia (81% sensitivity, FPR = 10%); 3) at 28.1-32 weeks of gestation, the sensitivity of multi-protein models was 85% (FPR = 10%) with the best predictors being activated leukocyte cell adhesion molecule, siglec-6, and VEGF-121; 4) the increase in siglec-6, activin-A, and VEGF-121 at 22.1-28 weeks of gestation differentiated women who subsequently developed early preeclampsia from those who had a normal pregnancy or developed late preeclampsia (sensitivity 77%, FPR = 10%); 5) the sensitivity of risk models was higher for early preeclampsia with placental MVM lesions than for the entire early preeclampsia group (90% versus 71% at 16.1-22 weeks; 87% versus 81% at 22.1-28 weeks; and 90% versus 85% at 28.1-32 weeks, all FPR = 10%); and 6) the sensitivity of prediction models was higher for severe early preeclampsia than for the entire early preeclampsia group (84% versus 71% at 16.1-22 weeks).ConclusionWe have presented herein a catalogue of proteome changes in maternal plasma proteome that precede the diagnosis of preeclampsia and can distinguish among early and late phenotypes. The sensitivity of maternal plasma protein models for early preeclampsia is higher in women with underlying vascular placental disease and in those with a severe phenotype.

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BackgroundLate-onset preeclampsia is the most prevalent phenotype of this syndrome; nevertheless, only a few biomarkers for its early diagnosis have been reported. We sought to correct this deficiency using a high through-put proteomic platform.MethodsA case-control longitudinal study was conducted, including 90 patients with normal pregnancies and 76 patients with late-onset preeclampsia (diagnosed at ≥34 weeks of gestation). Maternal plasma samples were collected throughout gestation (normal pregnancy: 2-6 samples per patient, median of 2; late-onset preeclampsia: 2-6, median of 5). The abundance of 1,125 proteins was measured using an aptamers-based proteomics technique. Protein abundance in normal pregnancies was modeled using linear mixed-effects models to estimate mean abundance as a function of gestational age. Data was then expressed as multiples of-the-mean (MoM) values in normal pregnancies. Multi-marker prediction models were built using data from one of five gestational age intervals (8-16, 16.1-22, 22.1-28, 28.1-32, 32.1-36 weeks of gestation). The predictive performance of the best combination of proteins was compared to placental growth factor (PIGF) using bootstrap.Results1) At 8-16 weeks of gestation, the best prediction model included only one protein, matrix metalloproteinase 7 (MMP-7), that had a sensitivity of 69% at a false positive rate (FPR) of 20% (AUC = 0.76); 2) at 16.1-22 weeks of gestation, MMP-7 was the single best predictor of late-onset preeclampsia with a sensitivity of 70% at a FPR of 20% (AUC = 0.82); 3) after 22 weeks of gestation, PlGF was the best predictor of late-onset preeclampsia, identifying 1/3 to 1/2 of the patients destined to develop this syndrome (FPR = 20%); 4) 36 proteins were associated with late-onset preeclampsia in at least one interval of gestation (after adjustment for covariates); 5) several biological processes, such as positive regulation of vascular endothelial growth factor receptor signaling pathway, were perturbed; and 6) from 22.1 weeks of gestation onward, the set of proteins most predictive of severe preeclampsia was different from the set most predictive of the mild form of this syndrome.ConclusionsElevated MMP-7 early in gestation (8-22 weeks) and low PlGF later in gestation (after 22 weeks) are the strongest predictors for the subsequent development of late-onset preeclampsia, suggesting that the optimal identification of patients at risk may involve a two-step diagnostic process.

A propósito de la reciente promulgación de la Resolución Ministerial N.º 486-2014/Minsa, que aprueba la guía técnica nacional para el aborto terapéutico, se ha generado un gran debate al respecto. Como un aporte a la discusión, se presenta una revisión sobre las definiciones y tipos de aborto, para luego centrarse en el denominado ‘aborto terapéutico’ y explorar las dificultades que existen para definirlo. Finalmente, sepresentan algunas observaciones a esta Guía técnica emitida por el Minsa. Se concluye que el término ‘aborto terapéutico’ es anacrónico y contradictorio porque el aborto no es un tratamiento que asegure mejorar la salud de la mujer ni la del niño. El término apropiado debería ser ‘interrupción del embarazo por razones médicas’.

This article, published in the journal Ultrasound in Obstetrics & Gynecology, examines the effects of serial amnioinfusions (AI) on fetal lung size/volume and intrapulmonary circulation in fetuses diagnosed with anhydramnios before 22 weeks of gestation. The study involved nine fetuses with anhydramnios due to renal agenesis or renal dysplasia, who received serial AI to maintain an amniotic fluid index (AFI) of 15-17 cm until 32 weeks or preterm premature rupture of membranes (PPROM). The results showed that there was an increase in lung size and improvement in intrapulmonary circulation after the AI, but the lung measurements remained below the expected mean for gestational age. [Extracted from the article]

Objetivo: Determinar si el empleo de la sutura compresiva del útero (técnica de B-Lynch) durante la cesárea en casos de atonía uterina disminuye la pérdida sanguínea y evita la histerectomía posparto. Material y Métodos: Estudio retrospectivo de las cesáreas que cursaron con atonía uterina durante la intervención, desde el 1 de enero de 1990 al 31 de diciembre de 2003, en el Hospital San Bartolomé de Lima. El método estándar de manejo de la atonía uterina en la cesárea consiste en el masaje uterino, el empleo de agentes uterotónicos (ocitocina, prostaglandinas), ligadura de arterias uterinas/hipogástricas y la histerectomía posparto. Las variables maternas y perinatales obtenidas de las historias clínicas fueron ingresadas a una base de datos computarizado (SPSS versión 10). Resultados: Se identificó 46 casos: en 30 se empleó la técnica B-Lynch y en 16 el método estándar. No hubo diferencias en las características maternas entre ambos grupos. El grupo de B-Lynch presentó subjetivamente menor perdida sanguínea, recibió menor número de unidades de sangre transfundida y presentó significativo menor riesgo de histerectomía posparto comparado con el método estándar (promedio ± DE: 1144,4±311,7 mL vs 1666,9±794,4 mL, p

Objetivo: Identificar los factores etiopatogénicos asociados a la muerte fetal y neonatal de una población de la ciudad de Lima, Perú. Lugar: Hospital San Bartolomé en Lima, entre 1 de enero de 1996 y 31 de diciembre de 2000. Material y Métodos: Estudio retrospectivo de todos los casos de muerte fetal mayor de 20 semanas de gestación y muerte neonatal antes de los 28 días de nacimiento sometidos a estudio de autopsia y anatomía patológica. Resultados: La prevalencia de muerte fetal fue 1,68% (508/30125) y de muerte neonatal 1,44% (434/30125). Todas las muertes fetales y 58,8% (255/434) de las muertes neonatales tuvieron autopsia. De 508 muertes fetales, 92 (18%) presentaron signos de autólisis, que no permitieron una apropiada identificación de los procesos etiopatogénicos involucrados. Las muertes fetales estuvieron asociadas a prematuridad (60,5%), defecto nutricional/vascular (78,1%), privación social (60,8%), anomalías congénitas anatómicas (14,6%) y respuesta inflamatoria (12,9%). La muerte neonatal estuvo asociada a la prematuridad (71,7%), privación social (61,1%), defecto nutricional/vascular (59,6%), anomalía congénita anatómica (28,6%), respuesta inflamatoria (20,0%). Conclusiones: La muerte fetal es consecuencia de factores patogénicos que interactúan tempranamente con la unidad madre-embrión/feto. La mayoría de los tejidos muertos de los fetos/neonatos muestra manifestaciones de varios factores etiopatogénicos en forma simultánea.

Background: Occupational exertion is associated with a higher risk of preterm delivery, although studies of leisure time activities generally document reduced risks. Less is known about the risk of preterm delivery immediately following episodes of moderate or heavy physical exertion.Methods: We conducted a case-crossover study of 722 women interviewed during their hospital stay for early preterm delivery, defined by a gestational age before 34 weeks, and after 20 weeks. Interviews occurred between March 2013 and December 2015 in seven hospitals in Lima, Peru.Results: The incidence rate ratio (RR) of early preterm delivery was 5.82-fold higher (95% confidence interval [CI] = 4.29, 7.36) in the hour following moderate or heavy physical exertion compared with other times and returned to baseline in the hours thereafter. The RR of early preterm delivery within an hour of physical exertion was lower for exertion at moderate intensity (RR = 2.43; 95% CI = 1.50, 3.96) than at heavy intensity (RR = 23.62; 95% CI = 15.54, 35.91; P-homogeneity < 0.001). The RR of early preterm delivery was lower in the hour following moderate physical exertion among women who habitually engaged in physical exertion >3 times per week in the year before pregnancy (RR = 1.56; 95% CI = 0.81, 3.00) compared with more sedentary women (RR = 6.91; 95% CI = 3.20, 14.92; P-homogeneity = 0.003).Conclusions: Our study showed a heightened risk of early preterm delivery in the hour following moderate or heavy physical exertion. [ABSTRACT FROM AUTHOR]

Background: An indirect comparison meta-analysis published in 2013 reported that both vaginal progesterone and cerclage are equally efficacious for preventing preterm birth and adverse perinatal outcomes in women with a singleton gestation, previous spontaneous preterm birth, and a sonographic short cervix. The efficacy of vaginal progesterone has been challenged after publication of the OPPTIMUM study. However, this has been resolved by an individual patient-data meta-analysis (Am J Obstet Gynecol. 2018;218:161-180).Objective: To compare the efficacy of vaginal progesterone and cerclage in preventing preterm birth and adverse perinatal outcomes in women with a singleton gestation, previous spontaneous preterm birth, and a midtrimester sonographic short cervix.Data Sources: MEDLINE, EMBASE, LILACS, and CINAHL (from their inception to March 2018); Cochrane databases, bibliographies, and conference proceedings.Study Eligibility Criteria: Randomized controlled trials comparing vaginal progesterone to placebo/no treatment or cerclage to no cerclage in women with a singleton gestation, previous spontaneous preterm birth, and a sonographic cervical length <25 mm.Study Appraisal and Synthesis Methods: Updated systematic review and adjusted indirect comparison meta-analysis of vaginal progesterone vs cerclage using placebo/no cerclage as the common comparator. The primary outcomes were preterm birth <35 weeks of gestation and perinatal mortality. Pooled relative risks (RRs) with 95% confidence intervals were calculated.Results: Five trials comparing vaginal progesterone vs placebo (265 women) and 5 comparing cerclage vs no cerclage (504 women) were included. Vaginal progesterone, compared to placebo, significantly reduced the risk of preterm birth <35 and <32 weeks of gestation, composite perinatal morbidity/mortality, neonatal sepsis, composite neonatal morbidity, and admission to the neonatal intensive care unit (RRs from 0.29 to 0.68). Cerclage, compared to no cerclage, significantly decreased the risk of preterm birth <37, <35, <32, and <28 weeks of gestation, composite perinatal morbidity/mortality, and birthweight <1500 g (RRs from 0.64 to 0.70). Adjusted indirect comparison meta-analyses did not show statistically significant differences between vaginal progesterone and cerclage in the reduction of preterm birth or adverse perinatal outcomes.Conclusion: Vaginal progesterone and cerclage are equally effective for preventing preterm birth and improving perinatal outcomes in women with a singleton gestation, previous spontaneous preterm birth, and a midtrimester sonographic short cervix. The choice of treatment will depend on adverse events and cost-effectiveness of interventions and patient/physician's preferences. [ABSTRACT FROM AUTHOR]

Metformin is everywhere. Originally introduced in clinical practice as an antidiabetic agent, its role as a therapeutic agent is expanding to include treatment of prediabetes mellitus, gestational diabetes mellitus, and polycystic ovarian disease; more recently, experimental studies and observations in randomized clinical trials suggest that metformin could have a place in the treatment or prevention of preeclampsia. This article provides a brief overview of the history of metformin in the treatment of diabetes mellitus and reviews the results of metaanalyses of metformin in gestational diabetes mellitus as well as the treatment of obese, non-diabetic, pregnant women to prevent macrosomia. We highlight the results of a randomized clinical trial in which metformin administration in early pregnancy did not reduce the frequency of large-for-gestational-age infants (the primary endpoint) but did decrease the frequency of preeclampsia (a secondary endpoint). The mechanisms by which metformin may prevent preeclampsia include a reduction in the production of antiangiogenic factors (soluble vascular endothelial growth factor receptor-1 and soluble endoglin) and the improvement of endothelial dysfunction, probably through an effect on the mitochondria. Another potential mechanism whereby metformin may play a role in the prevention of preeclampsia is its ability to modify cellular homeostasis and energy disposition, mediated by rapamycin, a mechanistic target. Metformin has a molecular weight of 129 Daltons and therefore readily crosses the placenta. There is considerable evidence to suggest that this agent is safe during pregnancy. New literature on the role of metformin as a chemotherapeutic adjuvant in the prevention of cancer and in prolonging life and protecting against aging is reviewed briefly. Herein, we discuss the mechanisms of action and potential benefits of metformin. [ABSTRACT FROM AUTHOR]