My daughter is 9 years 2 months old. She is very slim built- approximately 48lbs, 4ft.6inches tall. She used to be extremely low-weight until last year (generally at the 3rd percentile), but otherwise healthy and fit, and around the 20th percentile for height. Over the past year, she gained both height and weight, although is still by no means "overweight" Still is pretty skinny. This summer I noticed pubic hair, and am not sure I see any breast changes. She had some pubic hair at 8, but her ped. assured me that it was just fine normal hair, not the typical pubic hair. We are of Indian(Asian) origin, hence she has darker hair and it shows more. However, I notice this year that the pubic hair has definitely increased. She is an active, healthy young girl but has a sister, now 16, who was diagnosed with hypothyroidism at a very young age, and is on thyroxine ever since. She is short, at just over 5 ft.
I do not want to cause anxiety to my daughter, but although she shows none of the symptoms her sister had, should I consult an endocrinologist? If these are pubertal changes, should anything be done to slow them down if all thyroid functions are normal, in order to ensure she grows to her height potential?
Please advise.
Thanks