This study will assess growth over time and the clinical course of HCH in children by collecting growth measurements and other variables of interest.

Inclusion Criteria:

• Participants must be ≤ 15 years old at the time of signing the informed consent
• Participants must have genetic confirmation of Hypochondroplasia diagnosis

Exclusion Criteria:

• Have a diagnosis of another genetic short stature condition other than Hypochondroplasia or a genetic variant known to cause another genetic syndrome associated with short stature
• Received an investigational product or medical device within 6 months before the Screening visit

The study population will include approximately 400 pediatric individuals with hypochondroplasia.