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Las tasas acumuladas de concepción y nacimientos vivos después de la fertilización in vitro
S L Tan1, P Royston, S Campbell
1Hallam Medical Centre, London, UK.
Lancet (London, England)
|June 6, 1992
Resumen
Las tasas de éxito para la fertilización in vitro (FIV) disminuyen con la edad de la paciente y varían según la causa de la infertilidad. Las tasas acumuladas de concepción y nacimientos vivos disminuyen con los ciclos de tratamiento sucesivos, destacando los factores de edad e infertilidad en los resultados de la FIV.
Área de la Ciencia:
- La Medicina Reproductiva es una de ellas.
- Estudios de Infertilidad Estudios de Infertilidad
- Tecnología de reproducción asistida Tecnología de reproducción asistida
Sus antecedentes:
- Es crucial estimar el éxito de la fertilización in vitro (FIV) utilizando las tasas acumuladas de concepción y nacimientos vivos, teniendo en cuenta la edad y la causa de la infertilidad, pero los datos son limitados.
- El impacto de los ciclos de tratamiento repetidos en el embarazo, el parto en vivo y las tasas de fracaso en la FIV sigue siendo incierto.
Objetivo del estudio:
- Evaluar la influencia de la edad del paciente y la causa de la infertilidad en los resultados de la FIV.
- Para analizar las tasas acumuladas de concepción y nacimientos vivos en ciclos de FIV repetidos.
Principales métodos:
- Análisis de 5055 ciclos de FIV consecutivos de 2735 pacientes utilizando el enfoque de la tabla de vida.
- Análisis estadístico que incluye prueba de rango logarítmico y regresión logística para comparar las tasas entre los grupos de edad e infertilidad.
Principales resultados:
- Las tasas de concepción y nacimientos vivos por ciclo disminuyeron significativamente con el aumento de la edad (p < 0,001).
- Las tasas acumuladas de nacimientos vivos después de cinco ciclos fueron del 54% para las edades de 20 a 34 años, del 28,9% para las de 35 a 39 años y del 14,4% para las de ≥40 años.
- Las tasas diferían significativamente según la causa de la infertilidad (p < 0,001), siendo las más bajas en la infertilidad masculina o de factores múltiples. La tasa de fallo del embarazo aumentó en mujeres >34 años (p = 0,006).
Conclusiones:
- La edad de la paciente y la causa de la infertilidad son factores significativos que influyen en las tasas de éxito de la FIV.
- Las tasas de éxito por ciclo disminuyen con los sucesivos intentos de FIV, y el fracaso del embarazo aumenta con la edad materna de más de 34.
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