When expecting a baby, your body experiences significant hormonal shifts that can cause a range of symptoms. No two pregnancies are the same, so symptoms can vary greatly from person to person. However, some common early pregnancy symptoms include fatigue, changes in breast tissue, missed periods, frequent urination, and morning sickness. A missed period is often the first indication of pregnancy, accompanied by nausea and vomiting in more than half of pregnant women. Many can also experience fatigue, frequent urination, food cravings, back pain, and shortness of breath during the later stages of pregnancy.