May 15, 2014
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How Genes Determine the Human Height?

Understanding that most of your height is determined by genetics
Genetics play a primary role in determining the appearance of a person like; the color of his skin, hair and eyes,his height and many more. Scientists are still working hard to understand the varied and complex patterns of our genes; especially the pattern of genes which is responsible for the growth of our height because not a single but multiple genes together determine our height.  There are studies supporting this view. Scientists are still working on finding out the exact number of genes, but according to an estimate there is about 7 to 25 genes which may be working together to determine our physique.

Some children are much taller than their parents whereas in other cases there is a slight difference between the height of the parents and children.

Although genes are not the only attributes that decide our height. There are quite a few more factors which are also responsible for the height of a person like nutrition, environment pollution, smoking habits and health of a mother during pregnancy. You can get all the possible factors responsible in human growth in grow taller 4 idiots program, which is easily available online. Any of these factors can influence the growth rate.

After the birth of of a child, healthy diet plays an important role in his growth.. Get your child enough sleep, give him good nutritious diet and try to keep him as much safe from drugs, diseases and environment pollution as possible.

Process of Human Growth

Humans have maximum growth rate between the age of 0 – 2 years. This growth rate begins to decline with the increase in age. Then comes the second growth cycle in the teenage which usually starts for females in or after the age of 11 whereas for males it starts in the age of 13 or so For females, this cycle continues till the 15-16 years of age whereas for males, this growth cycle continues for longer period i.e. up to 19-20 years of age.  One can still increase height after 25 with proper guidance and good balanced diet. In the teenage, the humans tend to grow faster but there is also a risk of malnutrition if they do not get proper balanced diet.

Human growth is dependent upon the Human Growth Hormone (hGH) regulated by somatotropin produced in pituitary gland. Somatotropin also induces insulin-like growth factor hormone (IGF-1), another hormone which contributes in the growth of humans. Both the hormones have best growth rate mainly in the teenage.

Most of the times, the good height is the representation of good health. But there is a contrast to this view too. Extreme height growth may also give rise to other health problems like cardiovascular disease. Excessive height growth puts more pressure on heart as much more time is needed to supply blood to every part of the body. As a result which blood takes longer time to reach the brain causing delay in communication with the brain.

Excessively long or excessively short, both types of height are not accepted in the society and men and women have to face humiliation and discrimination if they suffer from any of these.

There is a great difference in the average height for each generation and usually the males are taller than females. This is so because the females reach at the peak of the height growth in the younger age as the puberty starts much earlier in the females as compared with that of males.

There is also a difference in the height based on the geographic region. For example the average height of the people from UK is much higher than the people from Asian Countries like Philippines. It may be because of the genes or lifestyle or environmental pollution or may be because of all the factors.

The tallest man in the history is “Robert Pershing Wadlow” from Illinois, US. His height was 2.72m(8ft 11in) and he was just 22 years old when he died..

The tallest woman in the history is Zeng Jinlian from China. Her height was 2.48m(8ft 1½ in) and she died at the age of just 17 years. The shortest living human on earth is Chandra Bahadur Dangi from Nepal and his recorded height is .546m (1ft 9 ½ in).

Chart showing the average height of males and females in various world countries.

Country Average male height Average female height
Argentina 174.46 cm (5 ft 8.6 in) 161.03 cm (5 ft 3.4 in)
Australia 178.4 cm (5′ 10.2″) 163.9 cm (5′ 4.5″)
Bahrain 165.1 cm (5′ 5″) 154.7 cm (5′ 1″)
Belgium 176.6 cm (5′ 9.5″) 163.3 cm (5′ 4.3″)
Brazil 169.0 cm (5′ 6.5″) 158.0 cm (5′ 2.2″)
Cameroon 170.6 cm (5′ 7.2″) 161.3 cm (5′ 3.5″)
Canada 174 cm (5′ 8.5″) 161.0 cm (5′ 3.4″)
China (PRC) 164.8 cm (5′ 4.9″) 154.5 cm (5′ 0.8″)
China 169.4 cm (5′ 6.7″) 158.6 cm (5′ 2.5″)
Colombia 170.64 cm (5′ 7.2″) 158.65 cm (5′ 2.4″)
Cote d’Ivoire 170.1 cm (5′ 7″) 159.1 cm (5′ 2.7″)
Czech Republic 180.3 cm (5′ 11″) 167.3 cm (5′ 6.0″)
Denmark 180.6 cm (5′ 11.1″)
Dinaric Alps 185.6 cm (6′ 1.0″) 171.0 cm (5′ 7.2″)
Estonia 179.1 cm (5′ 10.5″)
Finland 178.2 cm (5′ 10″) 164.7 cm (5′ 4.7″)
France 174.1 cm (5′ 8.5″) 161.9 cm (5′ 3.7″)
Ghana 169.46 cm (5′ 6.7″) 158.53 cm (5′ 2.4″)
Gambia 168.0 cm (5′ 6.1″) 157.8 cm (5′ 2.2″)
Germany 178.1 cm (5′ 10″) 165 cm (5′ 4.9″)
Guatemala (Maya people) 157.5 cm (5′ 2″) 142.2 cm (4′ 6″)
Hong Kong 170 cm (5′ 7″) 158.8 cm (5′ 2.6″)
Hungary, Debrecen 179.14 cm (5′ 10.4″) 165.84 cm (5′ 5.2″)
Iceland 181.7 cm (5′ 11.5″) 167.6 cm (5′ 6″)
India 165.3 cm (5′ 5″) 165.3 cm (5′ 5″)
Indonesia 158.0 cm (5′ 2.2″) 147.0 cm (4′ 10.0″)
Indonesia, East Bali 162.4 cm (5′ 3.9″) 151.3 cm (4′ 11.5″)
Iran 174.24 cm (5′ 8.6″) 160.0 cm (5′ 3″)
Iraq 165.4 cm (5′ 5.1″) 155.8 cm (5′ 1.3″)
Israel 175.6 cm (5′ 9.2″) 162.7 cm (5′ 4.1″)
Italy – Middle & North 176.9 cm (5′ 9.7″) 163.2 cm (5′ 4.2″)
Italy – South 174.2 cm (5′ 8.0″) 160.8 cm (5′ 3.3″)
Japan 171.2 cm (5′ 7.4″) 158.8 cm (5′ 2.6″)
Korea, South 175.26 cm (5′ 9″) 162.56 cm (5′ 4″)
Lithuania 176.3 cm (5′ 9.4″)
Malaysia 164.7 cm (5′ 4.8″) 153.3 cm (5′ 0.4″)
Malta 169 cm (5′ 6.5″) 159 cm (5′ 2.6″)
Malawi 166 cm (5′ 5.3″) 155 cm (5′ 1.1″)
Mali 171.3 cm (5′ 7.4″) 160.4 cm (5′ 3.2″)
Mexico, State of Morelos 167 cm (5′ 5.7″) 155 cm (5′ 1.1″)
Netherlands 184.8 cm (6′ 0.8″) 168.7 cm (5′ 6.4″)
New Zealand 177.0 cm (5′ 9.7″) 165.0 cm (5′ 5″)
Nigeria 163.8 cm (5′ 4.5″) 157.8 cm (5′ 2.1″)
Norway 179.9 cm (5′ 10.8″) 167.2 cm (5′ 5.9″)
Philippines 163.5 cm (5′ 4.4″) 151.8 cm (4′ 11.8″)
Portugal 172.8 cm (5′ 8″)
Singapore 170.6 cm (5′ 7.2″) 160 cm (5′ 3″)
South Africa 169.0 cm (5′ 6.5″) 159.0 cm (5′ 2.5″)
Spain 170 cm (5′ 7″) 161 cm (5′ 3.3″)
Sweden 180 cm (5′ 10.9″) 166.9 cm (5′ 5.7″)
Switzerland 175.5 cm (5′ 9″) 164.0 cm (5′ 3.8″)
Taiwan 171.45 cm (5′ 7.5″) 159.68 cm (5′ 2.75″)
Thailand 167.5 cm (5′ 5.9″) 157.3 cm (5′ 1.9″)
Turkey 173.74 cm (5′ 8.4″) 161.4 cm (5′ 3.5″)
United Kingdom 176.8 cm (5′ 9.6″) 163.7 cm (5′ 4.4″)
U.S. 178.2 cm (5′ 10.2″) 164.1 cm (5′ 4.6″)
Vietnam 167 cm 156 cm

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