Breast development , also known as mammogenesis , is a complex biological process in primates that takes place throughout a female's life. It occurs across several phases, including prenatal development , puberty , and pregnancy. At menopause , breast development ceases and the breasts atrophy. Breast development results in prominent and developed structures on the chest known as breasts in primates, which serve primarily as mammary glands.
When does breast development begin?
What is 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. 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.
Breast hypertrophy is a rare medical condition of the breast connective tissues in which the breasts become excessively large. The condition is often divided based on the severity into two types, macromastia and gigantomastia. Hypertrophy of the breast tissues may be caused by increased histologic sensitivity to certain hormones such as female sex hormones , prolactin , and growth factors. It was first scientifically described in Some resources distinguish between macromastia Greek, macro : large, mastos : breast , where excessive tissue is less than 2. Hypertrophy of the breast can affect the breasts equally, but usually affects one breast more than the other, thereby causing asymmetry, when one breast is larger than the other. The condition can also individually affect the nipples and areola instead of or in addition to the entire breast. The effect can produce a minor size variation to an extremely large breast asymmetry. Breast hypertrophy is classified in one of five ways: as either pubertal virginal hypertrophy , gestational gravid macromastia , in adult women without any obvious cause, associated with penicillamine therapy, and associated with extreme obesity.
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