What is the typical age range at which patients with Rett syndrome begin to show developmental delays?

Patients with Rett syndrome typically begin to show developmental delays between the ages of 6 to 18 months. This condition primarily affects girls and is characterized by a period of normal early development followed by a loss of acquired skills, particularly in motor and cognitive function.

During this time frame, caregivers might notice that while the child initially seems to be developing normally, there is a progressive regression in their abilities, including speech and motor skills. The onset of these delays is critical for diagnosis, as interventions are most effective when implemented early in the course of the condition.

Understanding this timeline is crucial for caregivers and healthcare professionals, as identifying the early signs of developmental delays can lead to timely support and resources for the affected individual and their family. The other age ranges listed do not align with the typical progression observed in Rett syndrome, making them less relevant in this context.