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En realidad, este estudio, publicado en “American Journal of Obstetrics and Gynecology”, coincide con las recientes recomendaciones del American College of Obstetricians and Gynecologists, al señalar que es innecesario limitar el uso de analgesia epidural antes de que exista una dilatación uterina de al menos 4 centímetros.
Los investigadores evaluaron a mujeres con embarazos no complicados que recibieron analgesia durante el parto espontáneo antes de haber dilatado 4 cm. En total, incluyeron 223 mujeres que recibieron analgesia intravenosa y 278 dieron a luz con analgesia epidural durante el 92% del tiempo. Los investigadores observaron que la analgesia epidural ralentizó el proceso de parto sólo de 4 a 5 cm de dilatación, sin diferencias entre ambos grupos en el resto de la fase activa.