when does the biological stage of puberty end
Puberty On average, girls begin puberty around ages 10–11 and end puberty around 15–17; boys begin around ages 11–12 and end around 16–17.[1][2][3][4][5] The major landmark of puberty for females is menarche, the onset of menstruation, which occurs on average between ages 12 and 13;[6][7][8][9] for males, it is the first ejaculation, which occurs on average at age 13.[10] In the 21st century, the average age at which children, especially girls, reach puberty is lower compared to the 19th century, when it was 15 for girls and 16 for boys.[11] This can be due to any number of factors, including improved nutrition resulting in rapid body growth, increased weight and fat deposition,[12] or exposure to endocrine disruptors such as xenoestrogens, which can at times be due to food consumption or other environmental factors.[13][14] Puberty which starts earlier than usual is known as precocious puberty, and puberty which starts later than usual is known as delayed puberty.