Hello.. Though u have not provided exact height and weight of your child at different ages as your child has been started on some injections I presume it's growth hormone deficiency though I don't have any reports. Aftrr growth hormone therapy height gain should be around 10 to 12 cm in 1st Yr if he is diagnosed as Growth hormone deficiency. Adequate nutrition is most important factor along with these injections so try giving high protein diet . Also technique of injection, compliance and associated
thyroid, cortisol deficiency, celiac disease needs to be checked.I have provided few points but U need proper Endocrine consultation for thorough history and investigations.
Next Steps
Consult good endocrinologist In person.