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1.
Front Med (Lausanne) ; 11: 1338516, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38298815

RESUMO

Pregnancies resulting from assisted reproductive techniques (ART) are increasingly prevalent worldwide. While most pregnancies conceived through in-vitro fertilization (IVF) progress without complications, mounting evidence suggests that these pregnancies are at a heightened risk of adverse perinatal outcomes. Specifically, IVF pregnancies involving oocyte donation have garnered attention due to numerous reports indicating an elevated risk profile for pregnancy-related complications within this subgroup of patients. The precise mechanisms contributing to this increased risk of complications remain incompletely understood. Nonetheless, it is likely that they are mediated by an abnormal immune response at the fetal-maternal interface. Additionally, these outcomes may be influenced by baseline patient characteristics, such as the etiology of infertility, absence of corpus luteum, and variations in endometrial preparation protocols, among other factors. This review aims to succinctly summarize the most widely accepted mechanisms that potentially contribute to the onset of placental dysfunction in pregnancies conceived through oocyte donation.

2.
Fetal Diagn Ther ; 50(4): 299-308, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37307807

RESUMO

INTRODUCTION: Pregnancies conceived through assisted reproductive techniques (ARTs) are on the rise worldwide and have been associated with a higher risk of placental-related disease in the third trimester. METHODS: A cohort was created of singleton pregnancies after assisted reproduction, admitted at our institution for delivery, between January 2020 and August 2022. Fetal growth velocity from the second trimester to delivery was compared against a gestational-age-matched group of pregnancies spontaneously conceived according to the origin of the selected oocyte (i.e., autologous vs. donated). RESULTS: 125 singleton pregnancies conceived through ART were compared to 315 singleton spontaneous conceptions. Overall, after adjusting for possible confounders, multivariate analysis demonstrated that ART pregnancies had a significantly lower estimated fetal weight (EFW) z-velocity from the second trimester to delivery (adjusted mean difference = -0.002; p = 0.035) and a higher frequency of EFW z-velocity in the lowest decile (adjusted OR = 2.32 [95% CI, 1.15-4.68]). Also, when ART pregnancies were compared according to the type of oocyte, those conceived with donated oocytes showed a significantly lower EFW z-velocity from the second trimester to delivery (adjusted mean difference = -0.008; p = 0.001) and a higher frequency of EFW z-velocity in the lowest decile (adjusted OR = 5.33 [95% CI, 1.34-21.5]). CONCLUSIONS: Pregnancies achieved through ART exhibit a pattern of lower growth velocity across the third trimester, especially those conceived with donated oocytes. The former represents a sub-group at the highest risk of placental dysfunction that may warrant closer follow-up.


Assuntos
Doenças Placentárias , Placenta , Gravidez , Feminino , Humanos , Ultrassonografia Pré-Natal/métodos , Desenvolvimento Fetal , Terceiro Trimestre da Gravidez , Idade Gestacional
3.
Rev. chil. obstet. ginecol. (En línea) ; 87(1): 62-67, feb. 2022. tab
Artigo em Espanhol | LILACS | ID: biblio-1388710

RESUMO

Resumen El concepto de familia ha cambiado con los años y la constitución de los hogares en Chile ya no es la misma que hace un siglo. Las familias diversas en nuestro país han existido durante toda la vida, pero el conocimiento de cómo se han constituido y la existencia de un catastro en Chile son escasos. El objetivo de esta revisión es mostrar cómo se han constituido las familias diversas en Chile, cómo ha sido el acceso de estas a las técnicas de reproducción asistida, cuál ha sido la política del Estado y las aseguradoras de salud (Fonasa e Isapres) en las coberturas, y qué ha pasado con la legislación a lo largo de los años que ha facilitado la constitución de nuevas familias. Por otra parte, se pretende mostrar cuáles son las barreras al acceso por parte de las familias diversas y la necesidad de una ley de reproducción asistida que permita el acceso a todas las personas independientemente de su estado civil, orientación sexual o identidad de género, y que proteja a todos los nacidos chilenos por igual.


Abstract The image of a typical family has changed in recent years, as the makeup of households in Chile is no longer the same as decades ago. While gender and sexual diverse families in our country have always existed, there is a scarcity of reliable data. We review the evolution of the makeup of these diverse families in Chile and their access to assisted reproduction techniques. We also review national policies and health insurance coverage by both governmental and private carriers (Fonasa and Isapres) and how changes in legislation over the years have facilitated the constitution of these families. We outline barriers to access assisted reproduction techniques and the need for further legislative action to guarantee access to all citizens regardless of their marital status, sexual orientation, or gender identity.


Assuntos
Humanos , Família , Técnicas de Reprodução Assistida , Diversidade de Gênero , Acesso aos Serviços de Saúde , Política Pública , Pessoa Solteira , Fertilização In Vitro , Chile
5.
Rev. chil. obstet. ginecol ; 59(4): 301-6, 1994. ilus
Artigo em Espanhol | LILACS | ID: lil-144155

RESUMO

Presentamos el caso de una paciente de 33 años, G7P6A1, que rompió membranas a las 20 semanas de edad gestacional, demostrándose la presencia de Klebsiella oxytoca en el líquido anmiótico obtenido por amniocentesis. No habiendo signos clínicos de infección ovular, recibió tratamiento antibiótico parenteral. El control bacteriológico post tratamiento fue negativo. El parto fue resuelto a las 29 1/2 semanas debido a la sospecha de desprendimiento placentario, obteniéndose un recién nacido vivo, sexo femenino, 1520 g y Apgar 8-8. La evolución materna estuvo libre de morbilidad infecciosa y el neonato cursó una sepsis clínica con buena respuesta al tratamiento antibiótico, sin que se demostrara la presencia de otras complicaciones


Assuntos
Humanos , Feminino , Gravidez , Recém-Nascido , Ruptura Prematura de Membranas Fetais/tratamento farmacológico , Infecções por Klebsiella/diagnóstico , Amniocentese , Cesárea , Doenças do Recém-Nascido/microbiologia , Gentamicinas/administração & dosagem , Líquido Amniótico/microbiologia , Complicações Infecciosas na Gravidez/microbiologia , Segundo Trimestre da Gravidez , Sepse/diagnóstico , Sepse/tratamento farmacológico , Ultrassonografia Pré-Natal/métodos
7.
Rev. chil. obstet. ginecol ; 57(6): 440-2, 1992. ilus
Artigo em Espanhol | LILACS | ID: lil-119871

RESUMO

Se presenta un caso clínico de himen imperforado. Se describe el rol de la ecografía en su manejo y las alternativas terapéuticas actuales


Assuntos
Humanos , Feminino , Adolescente , Hematocolpia/diagnóstico , Hematometra/diagnóstico , Hímen/anormalidades , Doenças dos Genitais Femininos/cirurgia , Menarca , Distúrbios Menstruais/etiologia
8.
Rev. chil. obstet. ginecol ; 57(1): 34-8, 1992. tab, ilus
Artigo em Espanhol | LILACS | ID: lil-112265

RESUMO

Se presenta la experiencia de 16 casos de determinación de PH de cuero cabelludo fetal (método de Saling) en relación a monitorización electrónica fetal. Se concluye que en la actualidad su utilidad es restringida y de alto costo


Assuntos
Gravidez , Humanos , Feminino , Monitorização Fetal , Concentração de Íons de Hidrogênio , Couro Cabeludo/análise , Diagnóstico Pré-Natal
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