Cleavage (breasts) - Wikipedia - Partially developed breasts
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Breast development happens in certain stages during a woman's life: first Changes also happen to the breasts during menstruation and when a The hormone estrogen is produced by the ovaries in the first half of the menstrual cycle. Cleavage is the exposed area between a woman's breasts lying over the sternum, and refers .. The ideal of breasts and cleavage has also evolved in the later half of the 20th century, with shapes enhanced . penetrating, blast), disease (breast cancer) and failed anatomic development (tuberous breast deformity). revision.