If you have taken allergy medication in the early stages of pregnancy, then the main thing to look at is which allergy medication, not all medications will have an effect on the pregnant woman on the fetus. It is best to bring the allergy medication that you have taken to the eugenics department for further counseling so that the doctor can find out if the medication has the potential to cause malformations to the fetus. If it is an antihistamine allergy medication, there is a possibility that it may cause malformations to the fetus, so the medication must be given with caution. And it is also recommended that if you have any discomfort or allergic symptoms during pregnancy, you must go to the hospital and use the medication only under the guidance of your doctor, so as to avoid the possibility of the medication causing malformation to the fetus.