An egg and a sperm join to make a person who will be in a relationship with two parents, and together they will form a family. Couples go through a major change when they decide to have a baby and become parents. The life-changing nature of the experience, the fear of uncertainty and the responsibility for a new life require that the couple be adaptable, and causes them to know each other in a new way, which enables them to build a strong and healthy structure that can permit their child to develop and solve problems.