In certain conditions, some girls start way earlier or way later than that. But for girls with a normal growth and development curve, puberty will start during their middle school or high school years. During puberty, there is a natural increase in the hormone estrogen in the body.
For endocrinology appointment information, please call For diabetes appointment information, please call the Barbara Davis Center at The onset of breast development in girls less than 8 years of age may be the first sign of precocious puberty or more likely a condition referred to as benign premature thelarche.
On average, it's about two years from the time a girl first starts to show any breast development to the time that she actually starts her periods. Since girls in the United States start their periods anywhere from 9 to 15 years of age, breast development starting as early as 7 years of age is normal. In general, a girl starts her period in a pattern similar to her mother; if Mom started early, her daughter is more likely to start early.
Both boys and girls have breast tissue. Normal breast development first appears shortly after birth, and then again at the beginning of puberty. The timing of breast development varies greatly from one person to another and in some girls may not occur until well into the teenage years. Here's an overview of some of the main breast abnormalities that can occur in children.
New to DHgate? Join Free. Min Order: less than Unit s.
Increases and decreases in female hormones, like estrogen and progesterone, may make your breasts tender. They can also cause you to feel thickening, and even some lumps and bumps in your breasts as your period comes and goes each month. Could those lumps and bumps be cancer?