There are several factors contributing to girls starting their periods at an earlier age, including:
Increased Body Fat Percentage
Girls today are generally heavier than girls in previous generations. Increased body fat is linked to earlier puberty, as fat cells produce estrogen, a hormone that triggers menstruation.
Environmental Factors
Exposure to certain chemicals, such as bisphenol A (BPA), found in plastics and food containers, can disrupt hormone balance and accelerate puberty.
Improved Nutrition
Access to better nutrition and healthcare has led to improved overall health, including better growth and development, which can contribute to earlier puberty.
Genetics
A family history of early puberty can increase a girl's chances of experiencing it as well.
Other Factors
While less common, other factors like stress and early exposure to certain medications can also play a role in earlier menarche.
It's important to note that these factors are not mutually exclusive, and the exact reasons for earlier puberty are complex and can vary from individual to individual.
