Boys tend to show the first physical changes of puberty between the ages of 10 and 16. They tend to grow most quickly between ages 12 and 15. The growth spurt of boys is, on average, about 2 years later than that of girls. By age 16, most boys have stopped growing, but their muscles will continue to develop.
Although some men may continue to grow in their 20s, most men's growth plates are closed by 21 years. Hence, it is unlikely for men to grow after 21 years, with some exceptions. In a healthy growth pattern, your bone increases in length due to the growth plates in the bone called epiphyses.
However, once the growth plates in the bones close, a person will generally not grow any taller. Most females reach their full adult height aged 14–16 years. Most males reach their full height by the age of 16–18 years. It is very unusual for a person to grow after the age of 18 years.
For example, if you look at the CDC growth chart for boys 2 to 20 years, a 13-year-old boy who is 5'1" (61 inches tall) is in the 50th percentile. Based on that curve, they should reach an adult height between 5'9" or 5'10" (69–70 inches).
In both sexes, height growth continues until the growth plates close toward the end of puberty. Growth plates usually close at 15–16 years old in girls and at 17–18 years old in boys. However, this period can rarely continue until a person is 19–20 years old.
Early bloomers may start to notice changes in their bodies as early as age 10, whereas late bloomers may start at age 14. Of course, these changes could easily fall anywhere in between. Those who started on the later side, can expect to keep reaching new heights until the age of 18.
Teens might have slower growth if they: don't get enough protein, calories, and other nutrients in their diet. have a long-lasting (chronic) medical condition, such as problems with the kidneys, heart, lungs, and intestines.
The term “late bloomer” refers to a child who goes through puberty later than their peers. Constitutional growth delay, the medical term for this condition, runs in families. Late bloomers will catch up on their growth and have standard adult height, although it may take a little extra time and patience.
Stage 5 is the final phase. Development typically ends in this stage. Girls reach physical adulthood. Pubic hair may extend out to their thighs, and some girls may have a line of hair up to their belly button.
Most boys with constitutional delayed puberty are short compared with their peers, but because they have a delayed growth spurt, they usually catch up to other boys by the time they are 18 and have heights in the normal range as adults.
Boys tend to show the first physical changes of puberty between the ages of 10 and 16. They tend to grow most quickly between ages 12 and 15. The growth spurt of boys is, on average, about 2 years later than that of girls. By age 16, most boys have stopped growing, but their muscles will continue to develop.
Children reach puberty at different ages. Delayed puberty is when boys have little to no genital growth by age 14, or girls have no breast development by age 13, or no periods by age 16. You may also hear this called being a “late bloomer”.
No pill, formula, or nutritional supplement can increase someone's height. Mostly, our genes determine how tall we will be. Boys usually finish growing by about age 16. But each person is a little different, so everyone starts and goes through puberty on their body's own schedule.
According to World Health Organization (WHO), a 17-year-old boy's typical height is roughly 5′ 7″ (175.7 cm) [1].
Increasing your height after 18 is not possible, even through nutrition and exercise, because the growth plates stop growing. The growth plates (epiphyseal plates) are present at the end of long bones.
It's totally okay to be a 5'6/168cm 16-year-old male. Everyone grows at their own pace, and there's a wide range of heights that are considered normal. As for whether you'll grow taller in the next 2 years, it's hard to say for sure. Some people continue to grow until their early 20s, while others stop growing earlier.