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.
There is no perfect shape or size for breasts. Normal breasts can be large or small, smooth or lumpy, and light or dark. Your breasts start growing when you begin puberty.
Why are my breasts different sizes? Is there anything I can do about it? If you have just started developing breasts, one breast may grow more quickly than the other. This difference in breast size may even out.
Puberty typically isn't a favorite memory for any of us. During that angst-ridden ride between childhood and adulthood, nearly everyone's best goal is simply to fit in. That's even tougher when you're only in second grade.
These stages will be different as well for those undergoing gender transition. The size of the breasts will also vary a lot from one person to another. Yes, breasts can hurt when they grow.
Both boys and girls have breast tissue. Normal breast development first appears shortly after birth, and then again at the beginning of puberty. The timing of breast development varies greatly from one person to another and in some girls may not occur until well into the teenage years.
Is it true that when you or another person touches your boobs, they will get bigger? No, it's not true. Touching or massaging breasts does not make them grow. There's a lot of wrong information about breast development out there.
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.