Age Specific Fertility Rate

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Age Specific/Marital Fertility Rates, Total /Marital Fertility Rates and Gross Reproduction Rate. Apart from this, the chapter includes sex ratio at birth. To examine the changes in the levels of fertility during the last decade, the average values of these fertility indicators for the years 2014-16 are compared with that for 2004-06.

Vital Statistics Rapid Release - CDC

total fertility rate (TFR) for the United States in 2020 was 1,637.5 births per 1,000 women, down 4% from the rate in 2019 (1,706.0), another record low for the nation (3,9,10). The TFR estimates the number of births that a hypothetical group of 1,000 women would have over their lifetimes, based on the age-specific birth rate in a given year.

Modeling of Age Specific Fertility Rates of Jakarta in

Modeling of Age Specific Fertility Rates of Jakarta in Indonesia: A Polynomial Model Approach Author: Md. Rafiqul Islam Abstract―The purpose of this study is to build mathematical models to age specific fertility rates (ASFRs) and forward cumulative ASFRs for Jakarta, Indonesia.

Fertility in South Africa - Stats SA

in 2011. This may perhaps be a reflection of data quality. Total fertility rate is the lowest in the provinces of Gauteng and Western Cape, while the highest TFRs are found in Limpopo and Eastern Cape. Differences in the TFR across provinces may reflect the different levels of socio-economic status as well as the dominance of specific population

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Age-Specific Fertility Rate (ASFR[a, n]) Use the following data to calculate the ASFR per 1,000 for women age 20 24 and 25 29. Source: U.N. Demographic Yearbook, 1986. Island of Mauritius, 1985 Age Group of Mother Women Births 15-19 52 013 1884 20-24 54 307 6371 25-29 46 990 5362 30-34 40 211 2901 35-39 30 401 1170 40-44 23 496 268

A new relational method for smoothing and projecting age

values of age-specific fertility rates in addition to assumptions about mortality and migration. Due to random fluctuations in fertility rates over time, assumptions based on extrapolation from past changes in each age-specific fertility rate tend to result in erratic age patterns. Moreover such a procedure does not take into account the fact that

Fertility rates

The Age Specific Fertility Rate (ASFR) is the number of live births per 1,000 women of a specific age in a specified period - e.g., the age-specific fertility rate for 25-29 year old women in 2008 is calculated by dividing the number of births in 2008 to women aged 25-29 by the estimated population of women of that age in that year.


Age-specific fertility rate (ASFR) The age-specific fertility rate measures the annual number of births to women of a specified age or age group per 1 000 women in that age group. Annual growth rate (GR) The rate at which the population is increasing or decreasing in a given year due to


3.9 Estimates of General Fertility Rate (GFR), a refined measure of fertility, defined as the number of live births per thousand women in the reproductive age-group 15-49 years, is a useful tool for measuring fertility. The GFR for all-India and bigger States are given below in Statement 18 separately for rural and urban areas.

The Pattern of Age-Specific Fertility Rates

A study of the pattern of age-specific fertility rates by five-year age groups has revealed the possibil-ity of using the Pearsonian type I curve as a graduating equation. Such distinctions have been exam-ined for fifty countries having high, medium, and low fertility rates. Results have been found to be

Evaluation and Analysis of Fertility Data

The age-specific fertility rate measures the annual number of births to women of a specified age or age group per 1,000 women in that age group Where x , x+n refers to age, usually 5-year age


ASFR: Age-specific fertility rate expressed per 1,000 women Fertility is the most important component of population dynamics and plays a major role in changing the size and structure of the population of a given area.

Forecasting Age Specific Fertility Using Principal Components

of ages between 14 and 49. (The age-specific fertility rate (denoted by fkt in section 2) is defined as the number of births divided by the number-of women of age k in year t.) The age-specific fertility rates for any given year nearly follow the same smooth pattern, as displayed


TOTAL FERTILITY RATE is the sum of the age-specific birth rates (5-year age groups between 10 and 49) for female residents of a specified geographic area (nation, state, county, etc.) during a specified time period (usually a calendar year) multiplied by 5.

Total fertility rate - WHO

Method of measurement Total fertility rate is directly calculated as the sum of age-specific fertility rates (usually referring to women aged 15−49 years), or five times the sum if data are given in five-year age groups. An age-specific or age-group-specific fertility rate is calculated as the ratio of annual births to

General, Age-Specific, and Total Fertility Rates in Montana

The general fertility rate was calculated for each year from 2010 to 2019 as births per thousand women aged 15 to 44, and five-year, age-specific fertility rates were also calculated for those years. A total fertility rate, which is the estimate of the number of children a woman will have during her lifetime given


The median age of first cohabitation increases steadily with the standard of living, from 16.2 for women living in households with a low standard of living to 19.6 for women living in households with a high standard of living. 4.2 Fertility Levels NFHS-2 provides estimates of age-specific fertility rates (ASFR), total fertility rates (TFR), and

Documentation for Children per Woman (Total Fertility Rate)

The fertility level before the demographic transition is often referred to as natural fertility. Demographers tend to believe that fertility levels before the demographic transition have fluctuated 1 The total fertility rate or TFR is the sum of age-specific fertility rates. It can be interpreted as the number of

SF2.3: Age of mothers at childbirth and age-specific fertility

Chart SF2.3.D shows, by country, age-specific fertility rates by five-year age groups for the years 1970, 1995 and 2016. In almost all OECD countries, fertility rates among 20-24 year olds and 25-29 year olds are much lower today than they were in 1970. Much of the decline in fertility among women aged 20-29 occurred between 1970 and 1995,

Projecting Age-Specific Fertility Rates by Using Time-Series

age-specific fertility rates: the CARIMA model and the APC-ARIMA model. The forecasting performance of both models is examined using Dutch data. Alternatively, a deterministic time-series model is presented in which the age pattern of changes in the age-specific fertility rates between successive years is described by a cubic spline function.

Age specific birth rates, fertility rates and total fertility

1 All rates are per 1,000 female population within the specific age group. 2 Births to mothers under 15 or over 44 are not included in Total Fertility Rate. Total Fertility Rate estimates the number of children a hypothetical cohort of 1,000 females in the specified population would bear if they all

Chapter 4 - Fertility

Current fertility levels are measured in terms of age-specific fertility rates (ASFRs) and the total fertility rate (TFR). ASFRs are calculated by dividing the number of births in each age group into the total number of women for that age group. The TFR, a common measurement of current fertility, is the average of all of the ASFRs.

National Vital Statistics Reports - CDC

The total fertility rate (TFR) is defined as the expected number of births that a group of 1,000 women would have in their lifetimes according to the current age-specific birth rates. In addition to measuring the fertility of women, the TFR, unlike other measures of fertility, including the general fertility rate and crude birth rate,

Age-specific mortality

Age-specific mortality rates allow comparison between countries and over time for specific age groups Expressed as a rate per 1,000 in that age group Country Y has higher mortality among males aged 15-19 years (3.1 > 1.5 deaths per 1,000 males aged 15-19 years) However, we need more information to determine which country had higher levels of

Fertility of American Women: June 2000

The fertility rate for native women was considerably lower at 62 births per 1,000 women, although a simi-lar proportion of births (41 percent) to these women were first births. Higher fertility rates for foreign-born women are due primarily to higher age-specific fertility rates for women in the principal childbearing years of 20 to 34 years

General Fertility Rate and Total Fertility Rate

The TFR is the sum of the age-specific birth rates multiplied by five or (351.4 x 5 = 1757.0). Note that births to mothers under 15 are included in the 10-14 age group and births to mothers 45 and older are included in the 45-49 age group. The general fertility rate is an age/sex-specific birth rate while the total fertility rate is an

Low fertility: A review of the determinants

The most widely used measure of fertility at the population level is the total fertility rate (TFR). This indicator represents the average number of children that a woman in the population would have if she were to experience the age-specific fertility rates of the current calendar year across her lifetime.


AGE-SPECIFIC BIRTH RATE is the number of resident live births to women in a specific age group for a specified geographic area (country, state, county, etc.), divided by the total population of women in the same age group for the same geographic area (for a specified time period, usually a calendar year). This figure is multiplied by 1000 to

Modeling fertility curves in Africa

2. The pattern of age-specific fertility rate for African countries African countries are numbered among those in the world with the highest fertility rates (Norville, Gomez, and Brown 2003). Several factors have contributed to these high levels of fertility. Some of these factors include high level of infant and child mortality,


The age-specific fertility rate measures the annual number of births to women of a specified age or age group per 1,000 women in that age group. An age-specific fertility rate is computed as a

Concepts of Some Common Birth Statistics Clarified

for general fertility rate and ranked 42 nd for total fertility rate. The state with the highest of all three rates in 2005 was Utah with a BR of 20.9, a GFR of 90.4, and a TFR of 2472.5 per 1,000 population. Review: The general fertility rate is an age/sex-specific birth rate, while the total fertility rate is an age/sex-adjusted birth rate.

Fertility - Statistics

Fertility Age Specific fertility Rates (ASFR) are generally falling over the years. But during 1975 and 1987 the decline is mainly confined to women aged 30 and over. However, significant declines in ASFR s for women aged below 30 years as well was recorded after 1993.

Fertility and Population Growth in Assam

Specific fertility rate is adjusted for age and determines the fertility rate of women in each age-group, usually in 5 years interval. The following seven five-years age groups are presented in the data base like: 15-19, 20-24, 25-29, 30-34, 35-39, 40-44, 45-49.The age specific fertility curve is closed to be a bell shaped curve.


AGE-SPECIFIC FERTILITY RATE Age-speci˜c fertility rate (ASFR) is the number of live-births born to females of a speci˜c age group, out of every thousand females in the same age group. Illustration for computation of ASFR for 25-29 years Resident Age-Specific Fertility Rates, 1980 & 2020 F e m al es A g e d 2 5 - 9 Y e a r s UNDERSTANDING AGE

Total Fertility Rates -

Age specific fertility rate = Births per 1,000 women per year But: Our age group is 5 years of age wide So: (Theoretically) Every women is exposed to that rate for 5 years multiply by 5 Births per 1,000 women over 5 years of exposure to this rate Now: We want the number of births per woman while she is in that age group divide by 1000


The fertility age bracket for women is between ages 15 to 49 years. Age specific fertility rate, in turn, is the number of births given to by women of a specific age group per 1,000 women in that age group. In 2015, total fertility rate was 5.5 births per woman but increased in 2016 to 5.8 (NDHS, 2013). This means that women in Nigeria will

Explaining Age Specific Fertility Rates in India using

To experience the modest change in reproductivity, the age-specific fertility rate has been considered. For knowing the pattern of ASFR two polynomial models has been considered which are Model 1 (previously used): The third degree polynomial of x. y=a+bx+cx. 2 +dx. 3. Model 2 (proposed): The third degree polynomial of reciprocal of x. y

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Total Fertility Rate (TFR): Definition The average number of children that would be born to a woman by the time she ended childbearing if she were to pass through all her childbearing years conforming to the age-specific fertility rates of a given year