An app developed by the Murdoch Children's Research Institute, Royal Women's Hospital, and The University of Melbourne could revolutionise the way cerebral palsy is diagnosed and the timing of treatment.

The screening app has been offered, as part of a trial, to all Victorian parents who gave birth to an extremely preterm baby in the year to April 2017. Very small, preterm babies are at higher risk of developing cerebral palsy.

Currently, the average age for diagnosis of cerebral palsy in babies is 19 months, but that is often much later than ideal for maximising the benefit of treatment.

The simple app, called Baby Moves (Google Play Store), allows parents to record their baby's movements at home at three months of age, upload the video to a secure server and a trained assessor watches the video to screen the baby for cerebral palsy.

Physiotherapist Assoc Prof Alicia Spittle from the Women's, Murdoch Children's Research Institute and the University of Melbourne has led the development of the app.

"We wanted to ensure families that didn't have access to an assessment team early in the baby's development, particularly those in rural areas, could easily have their baby checked for cerebral palsy. We also wanted to bring down the age at which the average child is diagnosed," she said.

"It is really important that babies receive treatment early so that we can harness the neuroplasticity of the developing brain. At the moment, the average baby is diagnosed at 19 months which is not ideal to gain the most from treatment," Assoc Prof Spittle said.

"Most families are aware that their baby is having problems early in their development, but parents are often advised to wait until milestones, such as walking, are missed before being referred for an assessment and accessing treatment. This app makes it easy for parents to access that assessment early in their baby's development."