How many ultrasounds are necessary during pregnancy? According to the latest research, the safest imaging method for examining the fetus and mother during pregnancy is ultrasound. Can any number of ultrasounds be done at any time? Stay with us to discuss this issue. ### **What is ultrasound?** Sound is a form of wave energy that causes particles to oscillate. Sound frequency is the number of waves that are given to a point in a unit of time and is expressed in Hertz. The sound or the frequency of one cycle of one wave per second has a frequency of one hertz. When sound rays hit an object, their echoes are returned. The time taken between the sending of the sound wave and the return of its echo and its path are checked. According to this information, the distance and position of the object is calculated. Ultrasound, the frequency of its sounds is higher than the level that can be understood by humans. Diagnostic ultrasound has a wave range between 10-20 million Hz, which is lower than the wave range used in radar. **For more information on pregnancy ultrasounds, you can contact Dr. Seif's radiology and ultrasound center or visit the doctor's Instagram address. Dr. Saif's ultrasound center contact numbers: 88553310** #### **Use of ultrasound in pregnancy** Diagnostic ultrasound is used as a safe and important technique to assess and survive the fetus before delivery, which provides vital and important information about fetal movements, gestational age, normal versus abnormal fetal growth, placental and fetal anatomy, and a non-invasive test to evaluate the fetus. ### **How to perform ultrasound in pregnancy** Ultrasound can be performed abdominally or transvaginally during pregnancy, both of which provide a three-dimensional image of the body. Abdominal ultrasound is more valuable after the first trimester when the pregnant uterus has turned into an abdominal organ. ### ### **Important uses of ultrasound in pregnancy** **first trimester of pregnancy** - Confirmation of pregnancy - confirmation of the viability of the fetus - Determination of gestational age - Rejection of ectopic pregnancy - Determination of multiple pregnancy - Perform CVS - Determination of congenital malities such as bifurcated uterus, fibroid and ovarian cyst See the video of the shape of the fetus in ultrasound: **second trimester of pregnancy** - Determination or confirmation of gestational age - confirmation of the viability of the fetus - Determination of polyhydraminos and oligohydroaminos - Identification of IUGR - Determining the location and position of the fetus - Guide to amniocentesis **third trimester of pregnancy** - Confirmation of gestational age - confirmation of the viability of the fetus - Diagnosis of macrosomia - Diagnosis of congenital abnormalities - Diagnosis of IUGR - Determining the position of the fetus - Diagnosis of placenta previa and placental abruption - Use during amniocentesis and external rotation - Use when P.P - Evaluation of the volume of amniotic fluid - Doppler studies (Doppler ultrasound) - Evaluation and treatment of placenta ### **Advantages of ultrasound in pregnancy** Ultrasound causes rapid diagnosis in pregnancy and allows treatment in the early stages of pregnancy. Therefore, it reduces the intensity and duration of emotional and physical illness for the individual and the family. For example, the diagnosis of an abnormal fetus gives the family the choice to: 1. Use intrauterine surgery or other treatment methods for the fetus. 2. Terminate the pregnancy. 3. Be ready to have a sick fetus.