Besides genetics or hormones, breast size also varies according to the fat content of a person's body. Heavier people tend to have larger breasts than thinner people.
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Hormones are released in the body and several things take place including the growth of breasts.
The hormones that stop your period are estrogen and progesterone. Estrogen causes bloating, mood swings and headaches while progesterone causes acne, fatigue and tender breasts.
All people, males and females alike, have breasts. The size of these breasts are determined by genetics and the hormones that a body releases. Hormones are the primary cause of breast development.
genetics
Genetics.
Galactorrhea is caused by the disregulation of certain hormones in the human body. It is usually a benign condition which occurs in 5-32% of women but can also occur with men.
Genetics
genetics
Stress usually, or depending on the specific hormones you body produces
Genetics is the cause.
When your breasts are in the first stages of growing they can be especially sore because of the intense growth.