Before revision: There are many constraints on population growth or decay in a country : several are of socio-economic origins. Sometimes cultual constraintsalso exist: sexual intercourse is banned in various religions, during Nativity and Lent fasting periods.
After revision: There are many constraints on population growth or decay in a country : several are of socio-economic constraints, as demonstrated in this paper. For example, sexual intercourse is banned in various religions, during Nativity and Lent fasting periods.