Family Planning
Family planning means working out a plan with your partner on how you want to deal with procreation within the context of a sexual relationship. This covers things as varied as when and why to get pregnant, the number of children that are wanted, how to deal with fertility issues, how to avoid getting pregnant, whether to consider an abortion or adoption if an unwanted pregnancy occurs, etc., to say nothing of working out parental strategies with your partner.
Family planning is having children that you planned on having, and not children concieved by accident.