Yes.
No, hormones in your body do that.
No its hormones. If you're pregnant the body releases the hormones to increase the breast milk to feed a baby.
No. The only things that enlarge a breast is hormones. A male would have take female hormones to have a breast.
The main hormones responsible for breast growth are estrogen and progesterone. Estrogen stimulates the growth of breast tissue, while progesterone plays a role in the development of milk-producing glands. These hormones fluctuate during puberty, the menstrual cycle, pregnancy, and menopause, impacting changes in breast size and shape.
Estrogen
Hormones in puberty.
Genetics and hormones.
Breast milk or lactation is caused by pregnancy hormones and nursing.
oxytocin and prolactin
It is caused by hormones.
can anyone effect your hormones? spike your drink,or put something in your food?
If the lump on the breast is a hard one, then it is a matter of concern as it very well be a sign of breast cancer.