Page 18 - Health, Population and Environment Education 10

In order to calculate ASFR, generally total females in child bearing period are divided into
different age groups with an interval of 5 years, i.e.(15-19), (20-24), (25-29), (30-34), (35-39)
years, and so on. ASFR is more effective and accurate than CBR and GFR in calculating
fertility as there is use of data on specific age group of females in child bearing period. In
the context of Nepal, females of (20-30) years age group have more fertility than females
of other age groups.

Worked out example: 3
In a city of Nepal in 2012 A.D., there were 35000 women of (20 - 24) years and they gave
birth to 15000 children in the same year. Calculate the age specific fertility rate of those
women in that year.

Solution:
Given,
In a city of Nepal in 2012 A.D.
Total live births = 15000
Females of (20-24) years = 35000
Age specific fertility rate (ASFR) = ?
Now,
Total live births given by women of (20 -24) years
ASFR = × 1000
Mid year population of women of (20 - 24) years

15000
= × 1000
35000

= 428. 57
∴ ASFR of women of (20-24) years in that city of Nepal in 2012 A.D. was 428.57 per 1000.
In the above example, ASFR is calculated as 428.57 per 1000. It means that nearly 429 live
births were given by 1000 women of specific age group (20-24) years in that city of Nepal
in 2012 A.D.

Activity: 1

There were 20000 women of (25-29) years in a town in 2016 A.D. If the age specific
fertility rate of the women was calculated as 514. 75 per 1000, what would be total live
births given by them in that year.
Answer : 10295

d. Total Fertility Rate (TFR)
Total fertility rate is an index of child bearing performance of a woman in child bearing
period. It can simply be said as the average children given birth by a woman/female
during her child bearing period in a place. It is calculated by multiplying the sum of age

18 GREEN Health, Population and Environment Education Book-10