You can use the three-day rule to check if your baby has an egg allergy. An Imu test egg allergy kit is something that can be bought to test whether your baby is suffering from egg allergy or not. This test is quick and easy and does not cause any kind of discomfort to your baby. The test conducted through this kit takes only 30 minutes to render the results. You must follow the steps printed on the test kit to conduct the egg allergy test.