Female breast development


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Jump to navigation. Breast development is caused by hormones released by the ovaries at puberty. These hormones cause fat to accumulate, causing your breasts to enlarge.

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Normal Breast Development

Breast development happens in certain stages during a woman's life: first before birth, again at puberty, and later during the childbearing years. This starts with a thickening in the chest area called the mammary ridge or milk line. By the time a baby girl is born, nipples and the beginnings of the milk-duct system have formed.

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Normal Breast Development

Mammalia are so named based on the presence of the mammary gland in the breast. The mammary gland is an epidermal appendage, derived from the apocrine glands. The human breast consists of the parenchyma and stroma, originating from ectodermal and mesodermal elements, respectively.

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It is normal for girls and teenagers to have lots of questions about their breasts as they start to develop. Seeing the body change can be daunting, and it is perfectly normal to worry about what to expect. Here are some common questions and answers about breast development to help guide teenagers through the process. Breasts develop as the hormones estrogen and progesterone are released at puberty.