Total fertility rate, Biology

Assignment Help:

Total Fertility Rate

Total fertility rate (TFR) is the total number of children a women can be expected to bear in a given population if birth rates are constant for at least one generation. Replacement level is a value of TFR and is the number of children a couple must have to replace themselves. You might think that two parents would have to have only two children to replace themselves.

The actual average replacement level is, however, slightly higher, primarily because some children die before reaching their reproductive years. In developed countries the replacement level is fixed at 2.1. In developing countries where infant mortality rates are high and life expectancies are short, replacement level is about 2.7. If replacement level is low-below 2 i.e. each couple has children less than those required to replace themselves, then the population will actually decline as in the case of Sweden and Germany.


Related Discussions:- Total fertility rate

Nutritional demands of sports and dietary recommendations, Define Nutrition...

Define Nutritional Demands of Sports and Dietary Recommendations? There is a strong relationship between nutritional status and physical training. Whether it is to maintain hea

Define isolated soybean proteins in infant formulas, Define isolated soybea...

Define isolated soybean proteins in Infant formulas? Infant formulas, where milk solids have been replaced by soy products, are well established commercial products. ISP is the

Which part of the teeth is it important to remove plaque, From which part o...

From which part of the teeth is it particularly important to remove plaque. It is most significant to remove plaque from among the teeth and from the region where the gum cover

Explain a renewable exhaustible natural resource, A renewable exhaustible n...

A renewable exhaustible natural resource is: 1. Coal 2. Petroleum 3. Minerals 4. Forest Forest is a renewable exhaustible natural resource

Simple precautions to prevent injuries, When resheathing needles, simple pr...

When resheathing needles, simple precautions to prevent injuries are to: 1. use only one hand to scoop the cap 2. hold the sheath with a hemostat (suggested but will require

Define nervous system and the it's related disorders, Define Nervous System...

Define Nervous System and the it's related disorders? In this unit, we learnt about nervous system and the related disorders, which are termed as 'neurological disorders'. Neur

Causes of solid wastes, The main causes for the rapid growth in the quantit...

The main causes for the rapid growth in the quantity of solid wastes are- (i)     Over population: the ever increasing population is increasing all types of pollution; same is t

Paleomon., coxa of paleomon contain specialised organ called

coxa of paleomon contain specialised organ called

Define about the carbohydrates - nutritional biochemistry, Define about the...

Define about the Carbohydrates - nutritional biochemistry? Carbohydrates, you should observe by now, are made up of carbon, hydrogen and oxygen only with hydrogen and oxygen at

Explain genetic algorithms, Your task is to describe genetic algorithms, ex...

Your task is to describe genetic algorithms, explain why genetic algorithms are useful in solving the problem you have been set and conduct an investigation into the optimum parame

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd