Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer.
For many women, especially after 8 weeks gestation, sufficient information about the baby may be obtained with transabdominal ultrasound only. However, in the early pregnancy, the developing embryo is very small at 6 weeks gestation, the baby is only mm long and a transvaginal ultrasound may be required to get a better image of the baby. Transvaginal ultrasound is safe and commonly performed during all stages of pregnancy, including the first trimester.
Obstetric ultrasonography is the use of medical ultrasonography in pregnancyin which sound waves are used to create real-time visual images of the developing embryo or fetus in its mother's uterus womb. The procedure is a standard part of prenatal care in many countries, as it can provide a variety of information about the health of the mother, the timing and progress of the pregnancy, and the health and development of the embryo or fetus. The International Society of Ultrasound in Obstetrics and Gynecology ISUOG recommends that pregnant women have routine obstetric ultrasounds between 18 weeks' and 22 weeks' gestational age the anatomy scan in order to confirm pregnancy timing, to measure the fetus so that growth abnormalities can be recognized quickly later in pregnancy, and to assess for congenital malformations and multiple pregnancies twins, etc.
When you need more than a doctor, when you need a heart specialist, Prairie Heart has the answer. From high cholesterol to high blood pressure, aneurysms to arrhythmia, chest pain to cardiac care, the experts at Prairie Heart are prepared to stand by your side throughout your journey towards a healthy heart. Fill out the form below.
Ultrasound scans use sound waves to create a picture of the baby in the womb. Most women have one or more ultrasound scans during pregnancy. The two scans routinely offered during pregnancy are the nuchal scan and the anatomy scan.
Do you have an enquiry or suggestion? General Calculators. Addiction Medicine.
A dating scan is an ultrasound scan to determine how many weeks pregnant you are and your due date. Read on for more information about what a dating scan offers. A dating scan might be recommended to confirm your due date if you are unsure of your last menstrual period or your date of conception.
The results of ultrasound testing provide you and your health care provider with critical information about you and your baby. See below for descriptions of the information gathered from these two types of ultrasounds. Ultrasound uses high-frequency sound waves to create images of the inside of the body. The technique does not use any radiation.
A dating scan is an ultrasound examination which is performed in order to establish the gestational age of the pregnancy. Most dating scans are done with a trans-abdominal transducer and a fullish bladder. If the pregnancy is very early the gestation sac and fetus will not be big enough to see, so the transvaginal approach will give better pictures.
Author information: 1 Klinika za ginekologiju i akuserstvo, Medicinski fakultet, Novi Sad. During two routine obstetric ultrasound scans, between 11 and 14 gestational weeks and around 20 weeks, the fetus should be carefully examined after which the existence of anomalies can be confirmed or, with a limited certainty that ultrasound enables, excluded. In order to obtain high standards of ultrasound screening, a uniformed protocol is needed, which would enable standardized examination.