Factors that Contribute to Late Menarche
When a girl experiences her first menstrual period at or after the age of 15, it is known as late or delayed menarche. While this can happen naturally in healthy girls, there are several factors that can influence this occurrence.
One factor is abnormalities in the genitourinary tract. These abnormalities can disrupt the normal development of the reproductive system and result in a delayed onset of menstruation.
Poor nutrition and low body weight can also contribute to late menarche. Conditions that cause malabsorption, starvation, or anorexia nervosa can affect a girl’s overall health and hormonal balance, leading to a delay in the onset of her menstrual cycle.
Interestingly, having sisters in the household has also been found to be associated with late or delayed menarche. It is unclear why this relationship exists, but further research is needed to understand the underlying mechanisms.
Factors Affecting Age of Menarche
Studies have shown that various factors can influence the age at which girls experience their first menstrual period, known as menarche. One factor that has been found to be associated with the age of menarche is birth characteristics. While birth weight is not the sole contributing factor, research suggests that girls who were longer than 19.2 inches and weighed more than 6.6 pounds tend to reach menarche earlier compared to girls who were shorter and lighter at birth. This correlation holds even after considering other factors such as the mother’s nutritional status during pregnancy and socioeconomic factors.