There is no such thing as ultrasensitive growth hormone in medicine, it should refer to growth hormone, adult growth hormone 4.8ng/ml is normal, if newborn growth hormone 4.8ng/ml belongs to low growth hormone. Growth hormone is a substance secreted by the pituitary gland, which can promote growth and development, the general range of growth hormone in newborns is 15.0~40.0ng/ml, 4.8ng/ml belongs to the low level of growth hormone, which often leads to slow growth and development, and needs to be supplemented with growth hormone. As for people under 18 years old, it is 0.06~5.0ng/ml, and 4.8ng/ml belongs to the normal level and does not need special treatment. It is recommended that newborns with growth hormone 4.8ng/ml need to actively cooperate with doctors to identify the cause and target treatment.