There is no direct correlation between a woman’s menstruation and the degree of breast development. The onset of menstruation is usually closely related to the development of the ovaries and uterus. The onset of menstruation usually occurs around the age of 14 and varies from person to person. When a woman reaches puberty, her body organs will gradually mature. With the growth and development of the female uterus and ovaries will gradually mature, the endometrium with the body’s secretion of estrogen, will gradually thicken, when the fertilized egg is not fertilized, the endometrium shedding will occur when the menstruation, this situation is usually not directly related to the development of breasts. After puberty, women also experience the development of secondary sexual characteristics, with breasts gradually developing. Women also develop pubic hair and armpit hair, and their sexual organs mature during this stage. Females with developmental problems during puberty should go to a regular hospital for counseling and treatment in a timely manner.