Pregnancy is like a journey that takes place in different states. It is a journey that last for 40 weeks or nine moths after conception. Each month, there are unique changes that take defining baby’s growth and development. From conception, the baby develops in size through elongation and also in development of important organs. The baby grows from an embryo at conception to a fetus by the beginning of ninth month. In order to understand pregnancy well, it is divided into three stages; first trimester, second trimester, and third trimester.