Level 1: Symptoms and causes of colds in pregnant women. Colds in pregnant women refer to upper respiratory tract infections caused by viruses or bacteria during pregnancy. Symptoms of colds in pregnant women include sneezing, runny nose, sore throat, headache, fever, etc. These symptoms can make pregnant women feel very uncomfortable and even affect the health of the fetus. The main reason why pregnant women get colds is because their immunity decreases during pregnancy and they are susceptible to bacterial and viral attacks. In addition, cold weather can also easily cause pregnant women to catch colds. Level 2: How to Prevent Colds in Pregnant Women Prevention is the best treatment method. Here are some preventive measures: 1. Keep the room ventilated and clean, avoid crowds of people