1. Overview of symptoms in the first three months of pregnancy. In the first three months of pregnancy, many women will experience some physical and psychological changes. These changes are often early symptoms of pregnancy. Understanding these early symptoms can help expectant mothers better cope with physical changes and take timely measures to protect the fetus. 2. Physical changes 1. Breast swelling and pain: After pregnancy, due to changes in hormonal levels, the breasts will gradually increase in size and feel swelling and pain. 2. Nausea and vomiting: Many expectant mothers will experience nausea and vomiting in the first three months of pregnancy, especially