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Inicio Progresos de Obstetricia y Ginecología El coasting es eficaz en la prevención del síndrome de hiperestimulación ová...
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Vol. 44. Issue 11.
Pages 482-489 (January 2001)
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Vol. 44. Issue 11.
Pages 482-489 (January 2001)
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El coasting es eficaz en la prevención del síndrome de hiperestimulación ovárica y no afecta a los resultados de la fecundación in vitro
Coasting is effective in preventing ovarian hyperstimulation syndrome without affecting the results of in vitro fertilization
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V. Isaza, J.A. García-Velasco
Corresponding author
jgvelasco@ivi.es

Correspondencia: IVI-Madrid. Santiago de Compostela, 88, bajo. 28035 Madrid
, B. Scheffer, A. Landázabal, J. Martínez-Salazar, A. Requena
IVI-Madrid
A. Pellicer,☆☆, J. Remohí,☆☆, C. Simón,☆☆
Instituto Valenciano de Infertilidad (IVI) Facultad de Medicina. Universidad de Valencia
☆☆ Departamento de Pediatría, Obstetricia y Ginecología.Facultad de Medicina. Universidad de Valencia
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Resumen
Objetivo

Describir los resultados de los ciclos de FIV/ICSI en pacientes sometidas a coasting por hiperrespuesta a la estimulación ovárica controlada (EOC), así como la frecuencia de presentación y severidad del síndrome de hiperestimulación ovárica (SHO). Además, evaluar si la duración del coasting compromete los resultados del ciclo

Pacientes y métodos

Estudio retrospectivo de 42 ciclos de fecundación in vitro de pacientes con hiperrespuesta a la EOC sometidas a coasting (mantener la administración del análogo de la GnRH mientras se suprime la administración de gonadotropinas) hasta que los valores séricos de estradiol (E2) disminuyan a un valor “seguro” para administrar la hCG y programar la punción ovárica

Resultados

El valor de E2 sérico promedio al iniciar y finalizar el coasting fue de 6.427,6 ± 227,4pg/ml y de 2.454,7 ± 155,8pg/ml, respectivamente. Las tasas de implantación y de gestación fueron del 26,9 y del 53,8% respectivamente. No hubo SHO severo y sólo un 14,2% de SHO moderado. En aquellas pacientes en las que el coasting duró>4 días, la tasa de gestación fue significativamente menor que en las que el coasting duró ≤ 4 días (28,6 frente a 57,9%; p<0,05). La aparición de SHO fue igual en ambos grupos

Conclusiones

El coasting reduce la incidencia y severidad del SHO, evitando la cancelación del ciclo en pacientes de muy alto riesgo de desarrollar un SHO, lo que permite mantener excelentes tasas de embarazo y de implantación. Los resultados son mejores si el coasting no se prolonga más de 4 días

Palabras clave:
Coasting
Síndrome de hiperestimulación ovárica
Alta respuesta
Estimulación ovárica controlada
Abstract
Objective

a) To describe the final outcome of in vitro fertilization/intracytoplasmic sperm injection cycles and the incidence and severity of ovarian hyperstimulation syndrome (OHSS) in patients undergoing coasting, due to a high response to controlled ovarian hyperstimulation (COH); and b) To determine whether the duration of coasting affects the final cycle outcome

Patients and methods

Retrospective study of 42 in vitro fertilization/intracytoplasmic sperm injection cycles in patients with a high response to COH and submitted to coasting (withholding gonadotrophins while maintaining gonadotrophinreleasing analogue), until serum estradiol (E2) level lowers to a “safe” value allowing administration of human chorionic gonadotrophin and ovarian puncture

Results

Mean serum E2 level at the beginning and at the end of coasting was 6,427.6 ± 227.4pg/ml and 2,454.7 ± 155.8pg/ml respectively. The implantation and pregnancy rates were 26.9% and 53.8%, respectively. None of the patients had severe OHSS and only 14.2% had moderate OHSS. In patients in whom the coasting was prolonged for > 4 days, the pregnancy rate was statistically significantly lower than in those in whom it lasted for ≤ 4 days (28.6% versus 57.9%; p<0.05). No difference was found in the incidence of OHSS between both groups

Conclusions

Coasting is effective in reducing the incidence and severity of OHSS. This procedure prevents cicle cancellation in patients at high risk for developing OHSS, and achieving an excellent pregnancy rate. The results of coasting are better if it is not prolonged for more than 4 days

keywords:
Coasting
Ovarian hyperstimulation syndrome
High response
Controlled ovarian hyperstimulation
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Copyright © 2001. Sociedad Española de Ginecología y Obstetricia
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