The main hormone causing puberty in girls is Estrogen.
Estrogen
Estrogen is the main hormone involved with puberty in girls
The girls behave this way as the hormone level in them increases.
Hormones such as the male hormone Testosterone and the female hormone Estrogen.
The changes that take place are mostly due to the testosterone in males. In girls, the hormone oestrogen is important.
During puberty, you can expect physical changes such as growth spurts, development of secondary sexual characteristics (breast development in girls, facial hair in boys), voice changes, increased sweat and body odor, and acne due to hormone fluctuations. Puberty can vary in timing and intensity for each individual.
Girls do not change into boys during puberty. Girls can only turn into boys if they have a sex change operation and a continuing course of hormone injections.
Puberty is apparently triggered by a chemical from the hypothalamus gland, which stimulates the release of hormones by the pituitary gland, which in turn causes sex hormones to be generated in the ovaries (female) or testes (male). Puberty normally occurs between the ages of 10 to 17 for girls, and 12 to 18 for boys. Puberty is the post-adolescent onset of sexual physiology, as the body completes the development of the reproductive system. This includes hormonal changes, as well as associated behavioral attitudes and inclinations. Boys become more interested in girls, and girls in boys. This is the beginning of human adulthood. Changes in the body are not limited to sexual ones, but encompass extensive physical and mental alterations that define gender differences.
During puberty, both boys and girls experience physical changes such as growth spurts, development of secondary sexual characteristics (like facial hair in boys and breast development in girls), and hormonal changes leading to sexual maturity. Hormones like testosterone and estrogen play a key role in these changes, which usually occur between the ages of 10 and 14 for girls and 12 and 16 for boys.
Physical changes during puberty in girls include breast development, growth of pubic and underarm hair, onset of menstruation, widening of hips, and overall growth spurts. These changes are driven by hormonal shifts that trigger the development of secondary sexual characteristics.
The main chemical is called testostrone go"s though out your body and creates phyiscal changes insied and outside