Doppler sonography of pregnancy is done in what week? Color Doppler ultrasound or color ultrasound is more advanced than normal ultrasound and is not limited to pregnancy, and it can be used to examine the body's vessels, including the arterial system and the venous system. With this imaging method, it is possible to see the blood supply of tissues in different organs. ### **Use of color doppler ultrasound** - The most common **application of color ultrasound** in the lower limbs and examination of leg vessels, neck vessels including carotid arteries, gigolet vein. - Examining the aorta, abdominal vessels, splenic vessels, liver vessels, including the portal vein, kidney vessels, and segmental vessels. - With this ultrasound, it is possible to know the amount of blood supply, volume, speed of blood flow and their resistance level, and in this way, the treating doctor can notice the arterial stenosis or blockage, or clot or doublet in the veins of the body. - This ultrasound can be widely used in the discussion of infertility: in men, it helps to diagnose varicocele disease, and in women, it helps to diagnose infertility by examining the poor blood supply of the uterus and ovaries. **For more information on pregnancy ultrasounds, you can contact Dr. Seif's radiology and ultrasound center. Dr. Saif's ultrasound center contact numbers: 88553310** ### **Color doppler ultrasound is necessary in pregnancy?** Color Doppler ultrasound is not used in all pregnancies. This ultrasound is usually performed in mothers who: - The doctor notices that the fetus has slowed down. In these cases, there is a possibility that nutrition and oxygen supply in the placenta of the fetus is caused by blood supply disorders. - In mothers with sickle cell anemia - Mothers who suspect high blood pressure and pre-eclampsia (toxicity of pregnancy) can receive very valuable and useful information with color ultrasound. ### **The best time to do color doppler ultrasound** If we leave aside special cases of pregnancy such as twins, Doppler ultrasound is not useful in the first and second trimesters of pregnancy. Therefore, it is better not to do Doppler ultrasound of pregnancy earlier than 28 weeks. It is recommended to do this ultrasound from the 30th week onwards. ### **Advantages of Doppler ultrasound in pregnancy** An accurate pregnancy Doppler ultrasound can prevent many problems that a pregnant mother may have. It also prevents the risks that can threaten the fetus or even those that lead to the death of the fetus. ### **Doppler ultrasound indication in pregnancy** Of course, these examinations are not routinely performed in all pregnancies, and even though this ultrasound does not harm the mother and the fetus and the study is completely healthy, it is better for a person to have an indication for doing it so that it can be used in the best way for the mother and the fetus: One of the common indications for doppler examination of the placenta and fetus is when we find that the growth of the fetus has decreased in the beginning of the third trimester of pregnancy or around week 28-30 compared to the mother's olympia (the first day of the last menstrual period) or that the growth of the fetus has decreased by two weeks or more compared to the age of the fetus in the ultrasound performed in the first trimester of pregnancy. In this case, the best time for pregnancy Doppler ultrasound is around 30 to 32 weeks of pregnancy. If this examination detects a disturbance in nutrition and oxygenation of the placenta, according to the existing protocol, the pregnant mother will be monitored. The best time may be done before the end of pregnancy for the mother. Currently, according to the conducted studies, a precise Doppler ultrasound of the uterine arteries in the first and second trimesters of pregnancy can show to a large extent whether the mother's blood pressure will rise in the coming months and the placental blood supply insufficiency will lead to RUGR or not. If the examination is disturbed, the future problems of mother and fetus can be prevented to a large extent.