Hello. My son is 3 years 3 months. His height is 90 cm & weight is 11.8 kgs. He look very small in size as compared to kids of his age. He was born Iugr weighing 1.8 kgs & was just 43 cms. He has tall parents but he is so less in height that I worry if he will reach his genetic potential. He is super active & I give a balanced diet at home. What are your options?