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

What is isozymes, ISOZYMES : an enzyme having different molecular forms bu...

ISOZYMES : an enzyme having different molecular forms but catalyzing the same reaction.

Define the wealth care delivery, Define the Wealth Care Delivery ? The ...

Define the Wealth Care Delivery ? The challenge that exists today in many countries is to reach the whole population with adequate health case services and to ensure their util

Nuclear run-on, Nuclear run-on is a technique used to estimate the relativ...

Nuclear run-on is a technique used to estimate the relative rate of the transcription of a given gene, as opposed to steady-state level of the mRNA transcript (which is influenced

Explain the phase contrast microscope, Explain the Phase Contrast Microscop...

Explain the Phase Contrast Microscop? Unpigmented and unstained living cells can be easily observed by phase contrast microscope. It has a special objective and a condenser th

Explain the infarct exclusive technique, Explain the Infarct Exclusive Tech...

Explain the Infarct Exclusive Technique? Infarct Exclusive Technique :  Left ventriculotomy is done through the infarcted area. No attempt is made to close the ventricu

Explain the carrying capacity in ecology, Explain the carrying capacity in ...

Explain the carrying capacity in ecology? Carrying Capacity :  We have seen that natural populations do not normally achieve the maximum intrinsic rate of natural increase, o

Taxonomy, what arachnid is beneficial

what arachnid is beneficial

How dissimilar are walls of these two types of blood vessel, Are the arteri...

Are the arteries or the veins constituted of more muscle tissue? How dissimilar are the walls of these two types of blood vessels? The arterial system has thicker muscle walls

Iceberg phenomenon in relation to diabetes, Q. Iceberg phenomenon in relati...

Q. Iceberg phenomenon in relation to diabetes? Diabetes Mellitus cases are diagnosed by a doctor or a health worker by taking history, blood test for sugar level. But the undia

Oxaloacetate to malate, Oxaloacetate to Malate Oxaloacetate to Malate:...

Oxaloacetate to Malate Oxaloacetate to Malate: Oxaloacetate cannot  permeate mitochondria 1 membrane well and it must be transported across the membrane in the form of malate

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