The first month of pregnancy cold, if it is a common cold generally will not lead to fetal deformity, if it is some special viral infection may lead to fetal deformity. 1. Common cold: If it is just a common viral infection or a cold caused by catching a cold, it will not affect the growth and development of the fetus and will not lead to fetal deformities. This kind of common cold doesn’t need any special medication, and it can be cured by resting more and drinking more water, which will not have much effect on the fetus. 2. Special viral colds: If the cold is caused by some special viruses, such as rubella virus, the virus may pass through the placenta and affect the fetus, and the fetus is in the sensitive period of cell division and organ differentiation in the first month of pregnancy, which has a certain chance of causing fetal malformation. If you are worried that the flu may cause fetal malformation, it is recommended that you follow the doctor’s instructions to have regular checkups, and if the development of the fetus is normal, you don’t need to worry too much.