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. The first sign of breast development is slight swelling under the nipple, a stage of development called breast buds. As your breasts first start to grow, they can be very tender and sore.
Stock Photo - Young girl touching naked breast
Teenager breast Stock Photos - Page 1 : Masterfile
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.
Physical Development in Girls: What to Expect During Puberty
The key parts of the female breast include:. At the onset of puberty, female reproductive hormones — particularly estrogen —guide breast growth. Normal changes in the breast during pregnancy can include firming, enlarged nipples, darker nipples, and stretch marks on the skin due to enlargement.
SELECTION-SCREEN END OF BLOCK b2. SELECTION-SCREEN END OF SCREEN 600. SELECTION-SCREEN BEGIN OF SCREEN 700 AS SUBSCREEN. SELECTION-SCREEN BEGIN OF BLOCK b3 WITH FRAME TITLE text-010. PARAMETERS: TNO(10) TYPE c, SELECTION-SCREEN END OF BLOCK b3.