What are the tests needed to detect precocious puberty? The following examinations are generally required: 1. Examination of breast and vulva development. 2. Bone age check. If the bone age is normal and there are no other symptoms, it is generally recommended to observe; 3. If the bone age is older than the actual age, it is recommended to take fasting blood for sex hormone examination (GnRH stimulation test if necessary); 4, pelvic ultrasound examination (to investigate the development of the uterus and ovaries); 5, nuclear magnetic examination of the pituitary gland. If the child’s bone age is much older, it is recommended to do the MRI of pituitary gland; 6. IGF-1 and IGF-BP examination. To rule out precocious puberty due to tumor.