Your introduction covers just half of the topic. You should introduce your topic to the reader in full. You have not discussed that fatherhood should be emphasized as much as the motherhood. So, you need to talk about the modern scenario too. And you should tell us what you believe.
In todays world the life conditions alreadyhashave changed eitherboth from an economic orand social viewpoints .
.... condition has/ conditions have
This in turn has effectedaffectedtothe structure of families which havehas been created over years.
... "has" refers to the "structure"
However, I do not get a clear idea from this sentence. I think you better re-phrase this line to give a better meaning.
You begin this para with a very good sentence telling the reader that modern families live under different socioeconomic conditions. So you should build your argument upon this point. Contrast the life-styles and requirements of modern and old families. Then tell how difficult for one person to fulfill all family requirements. You can have a great para with this argument and convince your examiner with very good examples.