Resumo Objectives: to determine the prevalence of pathological findings according to the type of chorionicity in pregnancies in two institutions in Bogotá, Colombia. Methods: descriptive, retrospective, cohort study. Biometric variables were calculated, and pathological findings were evaluated according to the type of chorionicity in multiple pregnancies. Statistical characterization was performed with absolute frequencies, calculation of relative frequencies in qualitative variables, standard deviation measures, median and interquartile range. In addition, a descriptive analysis of the information was carried out. Results: 528 studies were carried out in 141 pregnant women, 98.5% (n = 139) twins and 1.4% (n = 2) triplets. A prevalence of 35.4% of fetal complications was calculated. The most frequent was fetal growth restriction (p=0.37). According to each type of chorionicity, fetal growth restriction was presented in 50% (1/2) of the trichorionics, 16.6% (7/42) of the monochorionics, and 11.3% (11/97) of the dichorionics. Conclusion: fetal growth restriction was the most common finding, both in trichorionics, monochorionics and dichorionics pregnancies.

Resumen Objetivos: el objetivo del estudio fue determinar la prevalencia de los hallazgos patológicos ecográficos en embarazos múltiples de acuerdo con la corionicidad en dos instituciones en Bogotá-Colombia. Métodos: estudio de cohorte, descriptivo, retrospectivo. Las variables biométricas realizadas y los hallazgos patológicos se evaluaron de acuerdo con el tipo de embarazo gemelar. Se realizó caracterización estadística con frecuencias absolutas, cálculo de frecuencias relativas en variables cualitativas, medidas de desviación estándar, mediana y rango intercuartílico. Además, se realizó análisis descriptivo de la información. Resultados: se realizaron 528 estudios en 141 gestantes, encontrando 98,5% (n=139) gemelares y 1,4% (n=2) triples. Se calculó una prevalencia de 35,4% de complicaciones fetales siendo más frecuente la restricción del crecimiento fetal (p=0,37). Según la corionicidad, esta complicación se presentó en 50% (1/2) de los tricoriónicos, 16,6% (7/42) de los monocoriónicos y 11,3% (11/97) de los dicoriónicos. Conclusión: la restricción del crecimiento fetal fue el hallazgo más común en los embarazos múltiples en la población estudiada.

Abstract Objectives: the aim is to determine the prevalence of hypertensive disorders and to describe the sociodemographic aspects and risk factors for preeclampsia, gestational hypertension and intrauterine growth restriction. Methods: a descriptive cross-sectional study. Maternal characteristics, history from the first prenatal visit and outcomes were obtained. The prevalence and percentages were calculated and described. Results: the prevalence of hypertensive disorders was 12.7%, preeclampsia was 8.0%, followed by gestational hypertension at 4.7%. Of the preeclampsia, 54.8% were severe and 11.9% were of early onset. Moreover, 56.5% of the severe preeclampsia had preterm deliveries. IUGR had a prevalence of 5.3%. Based on maternal history, the most relevant risk factors were a family and personal history of preeclampsia and IUGR. Conclusions: we found a considerable prevalence of preeclampsia with a high percentage of preterm deliveries, associated with varying severity. This data helps health professionals to be aware of the risk factors that can be followed up for preventing complications. The determination of the risk of developing a hypertensive disorder during pregnancy is fundamental to encouraging proper counseling and care for these women through gestation.

Resumen Objetivos: determinar la prevalencia de trastornos hipertensivos y describir los aspectos sociodemográficos y los factores de riesgo de preeclampsia, hipertensión gestacional y restricción del crecimiento intrauterino (RCIU). Métodos: estudio descriptivo de corte transversal. Se obtuvieron características maternas, antecedentes del primer control prenatal y los resultados obstétricos. Se calcularon y describieron las prevalencias y porcentajes. Resultados: la prevalencia de trastornos hipertensivos fue del 12.7%, la de la preeclampsia fue del 8.0%, seguida de la hipertensión gestacional con el 4.7%. Del total de gestantes con preeclampsia, el 54.8% fueron graves y el 11.9% fue de inicio temprano. Además, el 56.5% de las gestantes con preeclampsia severa tuvieron partos prematuros. La RCIU tuvo una prevalencia del 5.3%. Según los antecedentes maternos, los factores de riesgo más relevantes fueron los antecedentes familiares y personales de preeclampsia y RCIU. Conclusiones: se encontró una prevalencia considerable de preeclampsia con un alto porcentaje de partos prematuros, asociada a una severidad variada. Estos datos ayudan a los profesionales de la salud a conocer los factores de riesgo que se pueden monitorear para prevenir complicaciones. La determinación del riesgo de desarrollar un trastorno hipertensivo durante el embarazo es fundamental para fomentar el asesoramiento y la atención adecuados para estas mujeres durante la gestación.

Resumo Objetivo Analisar se a ingestão de acetilsalicílico (ASA) modifica o índice médio de pulsatilidade das artérias uterinas (UtA-PI) no 2° ou 3° trimestre em uma coorte de gestantes com média anormal de UtA-PI entre 11 e 14 semanas. Métodos Este é um estudo de coorte retrospectivo. Gravidezes únicas com média anormal de UtA-PI entre 11 e 14 semanas foram estudadas. As participantes foram divididas em 3 grupos: 1) Se a participante não tomou ASA durante a gravidez, 2) Se a participante tomou AAS antes das 14 semanas e 3) Se a participante tomou ASA após 14 semanas. A média do UtA-PI foi avaliada nos 2° e 3° trimestres e considerou-se que melhorava quando diminuía<95° percentil. Foram calculados a razão de prevalência (RP) e o número necessário para tratar (NNT). Resultados Foram avaliadas 72 participantes com média de UtA-PI>95° percentil no 1° trimestre de gravidez. Das 18 participantes que tomaram ASA, 8 participantes começaram antes de 14 semanas e 10 depois. Um total de 33,3% desses participantes melhoraram a média de UtA-PI nos 2° e 3° trimestres, embora não tenha sido estatisticamente significante (p=0,154). A razão de prevalência foi de 0,95 (intervalo de confiança [IC95%]: 0,31-1,89), mas entre os 1° e o 2° trimestres, a RP foi de 0,92 (IC95%: 0,21-0,99) e foi estatisticamente significativa. Conclusão O presente trabalho demonstra uma modificação da média de UtA-PI em participantes que faziam uso de ASA em comparação com aqueles que não faziam. É importante verificar se o ASA pode modificar os limites normais das artérias uterinas porque isso pode ter um impacto na vigilância.

Abstract Objective To analyze whether acetylsalicylic (ASA) intake modifies the mean uterine arteries pulsatility index (UtA-PI) at the 2nd or 3rd trimester in a cohort of pregnant women with abnormal mean UtA-PI at between 11 and 14 weeks of gestation. Methods This is a retrospective cohort study. Singleton pregnancies with abnormal mean UtA-PI at between 11 and 14 weeks of gestation were studied. The participants were divided into 3 groups: 1) If the participant did not take ASA during pregnancy; 2) If the participant took ASA before 14 weeks of gestation; and 3) If the participant took ASA after 14 weeks of gestation. The mean UtA-PI was evaluated at the 2nd and 3rd trimesters, and it was considered to improve when it decreased below the 95th percentile. The prevalence ratio (PR) and the number needed to treat (NNT) werecalculated. Results A total of 72 participants with a mean UtA-PI>95th percentile at the 1st trimester of gestation were evaluated. Out of the 18 participants who took ASA, 8 participants started it before 14 weeks of gestation and 10 after. A total of 33.3% of these participants had improved the mean UtA-PI at the 2nd and 3rd trimesters of gestation, although it was not statistically significant (p=0.154). The prevalence ratio was 0.95 (95% confidence interval [CI]: 0.31-1.89), but between the 1st and 2nd trimesters of gestation, the PR was 0.92 (95%CI: 0.21-0.99) and it was statistically significant. Conclusion The present work demonstrates a modification of the mean UtA-PI in participants who took ASA compared with those who did not. It is important to check if ASA can modify the normal limits of uterine arteries because this could have an impact on surveillance.

Resumo Objetivo Avaliar o índice médio de pulsatilidade da artéria uterina (UtAPI) em cada trimestre da gravidez como preditor de pré-eclâmpsia (PE) precoce ou tardia em gestantes colombianas. Métodos O UtAPI foi medido em gestações únicas em cada trimestre. O UtAPI como preditor de PE foi avaliado por odds ratio (OR), curvas receiver operating characteristic (ROC) e diagrama de Kaplan-Meier. Resultados A análise no 1° e 3° trimestres mostrou que um UtAPI anormal foi associado com PE inicial (OR: 5,99; intervalo de confiança [IC] 95%: 1,64–21,13; OR: 10,32; IC95%: 2,75–42,49, respectivamente). A sensibilidade e a especificidade foram de 71,4 e 79,6%, respectivamente, para o desenvolvimento de PE (area under the curve [AUC]: 0,922). A curva de Kaplan-Meier mostrou que um UtAPI de 0,76 (IC95%: 0,58– 1,0) no 1° trimestre foi associado com PE precoce, e que um UtAPI de 0,73 (IC95%: 0,55–0,97) no 3° trimestre foi associado com PE tardia. Conclusão As artérias uterinas mostraram ser uma ferramenta preditora útil no 1° e 3° trimestres para PE inicial e no 3° trimestre para PE tardia em uma população de gestantes com alta prevalência de PE.

Abstract Objective To evaluate the mean uterine artery pulsatility index (UtAPI) in each trimester of pregnancy as a predictor of early or late pre-eclampsia (PE) in Colombian pregnant women. Methods The UtAPI was measured in singleton pregnancies in each trimester. Uterine artery pulsatility index as predictor of PE was evaluated by odds ratio (OR), receiver operating characteristic (ROC) curves, and Kaplan-Meier diagram. Results Analysis in the 1st and 3rd trimester showed that abnormal UtAPI was associated with early PE (OR: 5.99: 95% confidence interval [CI]: 1.64–21.13; and OR: 10.32; 95%CI: 2.75–42.49, respectively). Sensitivity and specificity were 71.4 and 79.6%, respectively, for developing PE (area under the curve [AUC]: 0.922). The Kaplan-Meier curve showed that a UtAPI of 0.76 (95%CI: 0.58–1.0) in the 1st trimester was associated with early PE, and a UtAPI of 0.73 (95%CI: 0.55–0.97) in the 3rd trimester was associated with late PE. Conclusion Uterine arteries proved to be a useful predictor tool in the 1st and 3rd trimesters for early PE and in the 3rd trimester for late PE in a pregnant population with high prevalence of PE.

Resumen Introducción. El parto pretérmino es aquel que ocurre antes de la semana 37 de gestación. Este tipo de parto se asocia a múltiples factores de riesgo, algunos de los cuales pueden ser prevenidos. En Colombia son escasos los estudios sobre los factores de riesgo asociados al parto pretérmino, de ahí la importancia de su análisis. Objetivo. Identificar los factores de riesgo para parto pretérmino en un grupo de gestantes de Bogotá D.C., Colombia. Materiales y métodos. Estudio de cohorte retrospectivo. La muestra estuvo compuesta por 452 pacientes que habían participado en un estudio primario y que ya habían dado a luz. Resultados. La incidencia de parto pretérmino fue de 10.40% (IC95%: 7.60-13.20) y los factores de riesgo asociados fueron los siguientes: ser diagnosticada con preeclampsia severa, con un riesgo relativo (RR) de 7.47 (IC95%: 4.59-11.95); tener preeclampsia (severa y no severa), con un RR=5.05 (IC95%: 3.0-8.51), y ocurrencia de restricción del crecimiento intrauterino (RCIU), con un RR=4.40 (IC95%: 2.44-7.98). Conclusiones. De acuerdo con los hallazgos reportados en el presente estudio, es necesario planear e implementar estrategias y políticas públicas en Bogotá D.C. que promuevan mejores prácticas de atención prenatal que, a su vez, permitan la detección temprana de condiciones como la preeclampsia y la RCIU, lo que hará posible reducir la incidencia de partos pretérmino en la ciudad y utilizar la experiencia y resultados obtenidos en el resto del país.

Abstract Introduction: A preterm birth occurs before the 37th week of pregnancy. It is associated with multiple risk factors, some of which can be prevented. In Colombia, few studies have addressed the risks factors associated with preterm birth, hence the importance of analyzing them. Objective: To identify risk factors for preterm birth in a population of pregnant women in Bogotá D.C., Colombia. Materials and methods: Retrospective cohort study. The sample was composed of 452 patients who had participated in a primary study and had already given birth. Results: The incidence of preterm birth was 10.40% (95%CI: 7.60-13.20). The following risk factors associated with preterm delivery were found: being diagnosed with severe preeclampsia, with a relative risk (RR)=7.47 (95%CI: 4.59-11.95); having preeclampsia (severe and non-severe), with a RR=5.05 (95%CI: 3.0-8.51); and occurrence of intrauterine growth restriction (IUGR), with a RR=4.40 (95%CI: 2.44-7.98). Conclusions: According to the findings reported in this study, it is necessary to plan and implement strategies and public policies in Bogotá D.C. that promote better prenatal care practices that, in turn, allow the early detection of conditions such as preeclampsia and IUGR. This will reduce the incidence of preterm birth in the city and will allow using the experience and results obtained here in the rest of the country.