What factor is most likely to influence the timing of female sexual maturation?

The timing of female sexual maturation is largely influenced by genetics. Genetic factors play a crucial role in determining when puberty begins, affecting the onset of breast development, menarche, and other secondary sexual characteristics. Each individual carries a unique genetic blueprint that can greatly influence the timing of these developmental milestones.

While nutrition can impact overall growth and health, and exercise can affect body composition and hormonal levels, they do not have as strong a direct influence on the genetic timetable that dictates when sexual maturation occurs. Environmental factors, such as exposure to certain chemicals or stressors, might have some effects as well, but again, genetics remains the primary determinant of the timing of sexual development in females.