Girls usually stop growing and reach their final adult height by the age of 14 or 15, or a couple of years after menstruation begins. However, this age may vary depending on when they entered puberty. Girls tend to have a major growth spurt between the ages of 10 and 14, and most will have reached their adult height by the time they are 14 or 15 years old. During puberty, girls typically experience a growth spurt after their breasts begin to develop, followed by their first period two to three years later. After their first menstrual cycle, girls can reach their full adult height within two to two-and-a-half years. It is important to note that "normal" growth rates in humans occur within a range, and genetics largely determines growth patterns. Other factors that can have an impact on height include nutrition and hormonal imbalances.