This is a Canadian, Multicentre, Observational Registry to study Adherence and Long Term Outcomes of Therapy in paediatric subjects using Easypod™ electromechanical device for growth hormone treatment from hospital and to assess the level of adherence of subject receiving SAIZEN® via Easypod™ .

Subjects will be enrolled in a multicenter, longitudinal observational registry. Parents/subjects will provide their Informed Consent/assent to upload their data for populationbased analyses and optionally to adhere to a patient adherence support program designed to improve their adherence and, ultimately, clinical outcomes. Adherence data will be primarily derived from the Easypod™ device combined with physician data entry of outcome measures. Data will be collected retrospectively and prospectively. This will allow the establishment of adherence profiles and explore the hypothesis that patient adherence support programs improve adherence and subsequent clinical outcomes. Collected data will be also analyzed in a multinational pooled analysis of comparable national studies.

Primary Objective:

- To assess the level of adherence of subjects prescribed SAIZEN® via easypod™

Secondary Objectives:

• To describe the impact of adherence on clinical outcomes for subject prescribed SAIZEN via easypod™
• To identify adherence subject profiling

Inclusion Criteria:

• Prescribed SAIZEN® via the easypod™ auto-injector (SAIZEN® Health Canadian approved indications: Growth Hormone Insufficiency or Deficiency, Turner's Syndrome, Chronic Renal Failure, Small for Gestational Age
• Under 18 years of age, or over 18 without fusion of growth plates
• Parent's or legal guardian's written informed consent, given before entering data into the registry, with the understanding that the subject or parent/legal guardian may withdraw consent at any time without prejudice to future medical care. If the child is old enough to read and write, a separate assent form will be given as defined by Health Canada regulations. Adult consent is defined at 18+ in the province of Quebec, 16+ in the remainder of Canada.

Exclusion Criteria:

• Subjects taking growth hormone in whom growth plates have fused (i.e. for taking growth hormone for its metabolic effects)
• Contra-indications to SAIZEN® as defined in SAIZEN® Canadian Product Monograph.
• Use of an investigational drug or participation in another interventional clinical study

Pediatric subjects 18 and under who are prescribed SAIZEN® (Health Canada approved indications) using the easypod™ auto-injector.