Breast changes during pregnancy

My breasts don’t feel like they belong to me since I got pregnant, they have changed so much. Why is this happening?

The changes that a woman’s breasts undergo are to prepare them for their new function and are caused by hormones. Some women’s breasts grow fast right from the start – up to 3 cup sizes – while others notice little change. Breasts may be sore or tender because of their expansion. In addition the nipples and the areola (the area around the nipples) may grow and become darker. Some women feel little bumps under their skin. These are sweat glands and disappear after the pregnancy.

See also:
Breasts – Fluid leaking
Breasts – Pain