Prabin Kalikote

Rate of natural increase is the rate at which a population of a particular place is increasing or decreasing in a given year due to the surplus or deficit of births over deaths, expressed as percentage of the base year.

Mathematically,
RNI = (CRR - CDR/1000) * 100
Where,
RNI : Rate of Natural Increase.
CBR: Crude Birth Rate.
COR: Crude Death Rate.

It is one of the natural contraception method. It is probably the 1st scientific method based on periodic abstinence to be developed. Essentially, a women should record body temperature immediately on walking each morning to get a reading of basal temperature. To get proper record of every chance of body temperature, the thermometer should be kept either in mouth or armpit.

a.    Fecundity and Fertility.

b.    Natural and Artificial factor of population change.

The impact of migration on socio-economic and environmental aspects are:

- Socio-economic aspects.
Migration has both positive and negative impacts on socio-economic aspects. Due to migration, power, facilities, and services get centralized. And such centralization results in overcrowd in all fields such as health, education, employment, security, etc. Consequently, there col be lack of insufficient education and a health facilities, unemployment,...

Infant mortality rate can be defined as the total number of deaths of infants per 1000 live births in a specific area during a year.

Here,
Total number of live births (B)=2100
Total number of infant deaths (Do) = 60
Now,
IMR = ( Do/B ) * 1000
        = ( 60/2100 ) * 1000
        = 28.57
IMR of Pathari Sanischare Municipality in 2015 A.D was 28.57 per 1000 live births.

Cervical mucus method of contraception refers to test of mucus secreted by cervix to determine the safe & unsafe period of conception. The period with the chance of conception by checking the cervical mucus carefully. If the mucus is thick and sexual intercourse is done, there is high chance of conception by if the mucus is thin, there less chance of conception. Thus, this is the brief description about cervical mucus test method of contraception.

Migration is the movement of people from one place to another place by crossing its migration defining area and minimum dime duration by changing usual place of residence in the search of betterment and advancement.
Gross migration rate calculated by taking sum of total number of in-migrants and out-migrants in a specific year per 1,000 mid a year population of same year.

Mathematically
GMR = ( I+O/P ) * 1000
Where,
I= in-migrants.
O= out-migrants.
P=...