Some growth factors and hormone signals are transduced into mammary gland cells to activate cell cycle related genes and change quiescent cells to a growth stage.

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After receptor binding in mammary gland cells and via a series of complicated signal pathways, a “switch” of cell proliferation is turned on, thereby gradually promoting the growth of mammary acinous cells and ductal cells.

When breast tissue undergoes secondary development, the proliferation of mammary lobules and acini makes the overall breast fuller.

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From the appearance, the breasts will gradually appear more rounded and plump.

This is because the growth of breast tissue provides internal support and a sense of fullness to the breast, altering its contour and texture.

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At the same time, the connective tissue around the breast tissue will also adjust accordingly with the development of the breast to adapt to the new shape of the breast, further consolidating the structural stability of the breast.

Product optimization and tissue reshaping enhance the support for breasts. The breast weight is mainly borne by connective tissues which are more closely connected with the breast and fat tissues to form an organic whole, whereby shaping the healthy and beautiful breasts after secondary development.