Case report: Retracing atypical development: a preserved speech variant of Rett syndrome.

The authors watched old home videos of one baby girl. They looked for tiny odd movements, sounds, and face shapes. The baby later got the rare preserved-speech type of Rett syndrome.

They wrote down every early clue they could spot before six months of age.

Small things showed up early. Her hands moved in odd ways. Her cries and coos sounded different. Her face muscles looked stiff or loose.

These hints appeared long before the big skills were lost.

Wilkinson et al. (1998) first named the preserved-speech variant in 30 older girls. This 2009 case zooms in on the very first months of life and fills the gap.

McCauley et al. (2018) and Leaf et al. (2012) later used sound tools and listener tests to show that early baby babble is already off in Rett. They turned the same hunch into numbers and quick screeners.

Kremkow et al. (2022) counted canonical babbles and found far fewer by nine months. Together the papers line up: early voices matter, and we can now measure the gap.

You can rewind family videos of any girl who later shows Rett signs. Look for stiff hands, flat faces, and odd cry sounds before six months. Share these clips with the medical team. Earlier clues can speed up genetic testing and give families a head start on planning support.