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41ª Reunión Anual de ESHRE: La edad paterna avanzada se relaciona con un mayor riesgo de aborto espontáneo
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41st Annual Meeting of the European Society of Human Reproduction and Embryology (ESHRE)

Jun 29, 2025, 18:01 ET

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41ª Reunión Anual de ESHRE: La edad paterna avanzada se relaciona con un mayor riesgo de aborto espontáneo y menores tasas de nacidos vivos en ciclos de FIV con óvulos de donante

Un nuevo estudio internacional, presentado hoy en la 41ª Reunión Anual de la Sociedad Europea de Reproducción Humana y Embriología (ESHRE), revela que los ciclos de FIV con parejas masculinas mayores de 45 años conllevan un riesgo significativamente mayor de aborto espontáneo y menores tasas de nacidos vivos, incluso cuando se utilizan óvulos de donantes jóvenes

PARIS, 29 de junio de 2025 /PRNewswire/ -- Al aislar la edad paterna de los factores reproductivos femeninos mediante el uso exclusivo de óvulos de donante de mujeres jóvenes, el estudio proporciona evidencia sólida de que la edad masculina desempeña un papel crucial en el éxito reproductivo, desafiando la suposición común de que la edad del esperma tiene poco impacto una vez que se produce la fecundación.

El estudio retrospectivo analizó 1.712 primeros ciclos de donación de ovocitos realizados entre 2019 y 2023 en seis centros de FIV en Italia y España. Todos los ciclos utilizaron ovocitos de donante frescos y esperma congelado de parejas masculinas, incluyendo únicamente la primera transferencia de blastocisto. Las receptoras tenían una edad media de 43,3 años.

Los participantes se dividieron en dos grupos: hombres de 45 años o menos (n=1.066) y mayores de 45 (n=646). Si bien las tasas de fecundación y desarrollo embrionario fueron comparables entre los grupos, se observaron diferencias significativas en los resultados clínicos.

Las tasas de aborto espontáneo fueron notablemente más altas en las parejas en las que el hombre tenía más de 45 años, alcanzando el 23,8% en comparación con el 16,3% en el grupo de menor edad paterna. De igual manera, las tasas de nacidos vivos fueron significativamente más bajas en el grupo de mayor edad paterna, con un 35,1% frente al 41% en los hombres de 45 años o menos.

Al comentar los hallazgos, la Dra. Maria Cristina Guglielmo, embrióloga de Eugin Italy, afirmó: "Tradicionalmente, la edad materna ha sido el enfoque central en la medicina reproductiva, pero nuestros resultados muestran que la edad de la pareja masculina también desempeña un papel crucial e independiente. Incluso utilizando óvulos de donantes jóvenes y sanas y transfiriendo un solo embrión de alta calidad, observamos peores resultados en los hombres mayores de 45 años."

También enfatizó la importancia de examinar cómo la edad paterna afecta la salud de la descendencia. "Cada vez hay más evidencia que vincula la edad paterna avanzada con un mayor riesgo de trastornos del neurodesarrollo infantil. Nuestro trabajo futuro investigará los resultados a largo plazo en la salud y el desarrollo de los niños concebidos mediante ciclos de óvulos de donante con padres mayores, donde se minimizan los factores maternos, para aislar con mayor claridad los efectos paternos".

El resumen del estudio se publicará hoy en Human Reproduction, una de las revistas de medicina reproductiva más importantes del mundo.

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