In the early stages of pregnancy, a mild cold usually has no effect on the fetus. However, if the condition is serious, it may cause certain effects. In the early stage of pregnancy, because the body’s immunity is reduced, pregnant women are more susceptible to viral infections and have symptoms such as mild runny nose and sneezing, which can usually get better without medication, so they should pay attention to ensure rest at this time. In more serious cases, bacteria, viruses or high fever may affect fetal development, but it varies from person to person. It is important to pay attention to the safety of medication during pregnancy, because the fetus in the first trimester is relatively susceptible to external influences and needs to avoid using medication that may affect the health of the fetus. Therefore, you should not use medication on your own during pregnancy, but should be dealt with after consulting a physician. The common cold has little effect on the fetus, so pregnant women do not need to be very anxious when they catch a cold.