If you are allergic to the tubal contrast agent, you can’t understand the development of the uterus and whether the fallopian tubes are open by the method of tubal contrast, you can only understand whether the tubes are open by the method of tubal fluids, mainly under the ultrasound to complete the examination, and through the ultrasound to understand the fluids through the fallopian tubes to enter the pelvis, and also to determine whether the fallopian tubes are open or not. It is best not to have intercourse in 3-7 days after menstrual cleansing, after laboratory examination, after clinical examination without contraindications can do the fluids test, after the fluids, it is best not to have sex for 15 days, and after the fluids if the fallopian tube is smooth, 1 month after the pregnancy can be planned.