I m newly married don't know how a girl get pregnant when is the best time for the sex after how many days we should do sex please tell me?

It depends: If you don't know much about sex or pregnancy, you may want to read a lot on-line, or go talk with your doctor. It really is best to understand about your body before you try to get pregnant. It may be best to adjust to being married for a while before you try to have a baby. These are major life changes. Usually women are most fertile in the middle of the cycle between their periods.