Page 16 - Health, Population and Environment Education 10

Live births = 143672
Crude birth rate (CBR) = ?
Now,

According to the formula,
Total live births in a place in a year
CBR = × 1000
Mid year population of that place in the same year

143672
= × 1000
797456

= 180.16 per 1000

∴ CBR of that district in 2014 A.D. was calculated as 180.16 per 1000.
In the above example, CBR is calculated as 180. 16 per 1000. With this value, we understand
that nearly 180 live births took place among 1000 mid year population in the district in the
year 2014 A.D.

Advantages of CBR
i. CBR is the simplest form of measuring fertility.
ii. It is easy to calculate.

iii. There is need of only live births and mid year population to calculate CBR.

Disadvantages of CBR
i. It is the rough estimation of fertility as total population is considered.
ii. It is not useful to compare fertility of different age group of females.
iii. It is affected by age and sex composition of population.

b. General Fertility Rate(GFR)
The total live births given by 1000 women of child bearing period (15-49) years in a place
in a year is called as general fertility rate.

Mathematically,
Total live births given by women of 15-49 years
GFR = × 1000
Mid year population of women of 15-49 years

It is expressed per 1000.
General fertility rate is somewhat more accurate than crude birth rate as there is use of
data on women of 15-49 years. According to Nepal Demographic Health Survey 2011, the
GFR of Nepal was 96 per 1000.

16 GREEN Health, Population and Environment Education Book-10