My 9-year-old daughter is already starting to develop breasts. Is this normal? There's a wide range considered "normal" regarding when puberty starts and how fast it progresses.

What is normal breast development?
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Here's an overview of the major physical changes girls can expect as they go through puberty:. Girls usually begin puberty between the ages of 8 and 13 years old. The earliest sign of puberty in most girls is the development of breast "buds," nickel-sized bumps under the nipple. It is not unusual for breast growth to start on one side before the other. It's also common for breast buds to be somewhat tender or sore. Uneven breast growth and soreness are both totally normal and usually improve with time. Coarser hair will begin to grow in the genital area, under the arms, and on the legs. Around the time they reach middle school, many girls begin to show interest in shaving their legs and armpits. This is a personal choice; there is no medical reason to shave armpit or leg hair. Before giving them a razor, show them how to use it properly and avoid skin irritation and cuts, which can become infected.
Is this your child's symptom?
Breast development is a vital part of puberty in females. It occurs in stages: first before birth, then during puberty, and then again during the childbearing years. Changes also occur to the breasts during menstruation and when a woman reaches menopause. This is when a thickening in the chest area called the mammary ridge or milk line develops. By the time a baby girl is born, nipples and the start of the milk-duct system have formed. The first thing to develop are lobes, or small subdivisions of breast tissue. Mammary glands develop next, and consist of 15 to 24 lobes. Mammary glands are influenced by hormones activated in puberty.
You the reader assume full responsibility for how you choose to use it. Article Breast Buds Definition A small disc-shaped lump felt under the nipple areola Indicates the start of puberty. About This Topic Symptoms A small disc-shaped lump felt under the areola. The areola is the dark skin around the nipple. They sometimes start just on one side. Don't worry about that. Within 2 or 3 months, a breast bud will also appear on the other side.