Ultrasound Examination | Weeks 30-32
Third Trimester Scan for Fetal Development Assessment
What is the Third Trimester Review?
The third trimester scan is an advanced ultrasound examination typically performed in the third trimester of pregnancy, usually around weeks 30-34. The purpose of the examination is to assess fetal development at a more advanced stage of pregnancy, after organs have grown and matured, and to identify findings that may not always have been visible in earlier stages. During the examination, fetal structure, growth, amniotic fluid volume, placental position, fetal movements, and sometimes Doppler blood flow are assessed according to clinical need. Special attention is given to systems that may change or manifest later in pregnancy, such as the brain, kidneys, digestive system, heart, and skeleton. The third trimester scan does not replace previous scans, but rather provides an additional layer of security - an examination that allows a renewed and precise look at the fetus at a stage when some findings may be clearer.
At the clinic, the examination is performed with a thorough, calm, and personal approach, using advanced ultrasound equipment that enables high-quality and clear imaging, with detailed explanations provided throughout and after the examination.
Who is third trimester screening suitable for?
A third trimester scan is suitable for women interested in additional and comprehensive assessment of the fetus in advanced stages of pregnancy, beyond routine screenings.
The examination is particularly recommended in cases of previous findings in pregnancy, need for growth monitoring, suspected growth restriction, polyhydramnios or oligohydramnios, multiple pregnancy, or when there is a need for focused assessment of organs that develop and change even in the third trimester - such as the brain, heart, kidneys and digestive system.
Even in a normal pregnancy, a third trimester scan can provide additional reassurance before delivery, and allow an updated view of fetal development, position and general condition.
Why perform a third trimester scan?
Because even after early and late routine screenings show normal results, there are certain systems and findings that may develop or manifest only later in pregnancy. A third trimester scan allows us to look again, at the right time, with professional expertise and advanced technology – to provide parents with additional information and confidence toward the final stages of pregnancy.
Frequently Asked Questions About the Third Trimester Review
The third trimester scan is not mandatory for all pregnant women, but is highly recommended for women with risk factors. However, many women choose to perform it even without special risk factors, to get a complete picture of the fetus's condition before delivery and to alleviate anxieties. Dr. Hark recommends discussing the matter during a routine pregnancy visit and making an informed decision according to personal circumstances.
IUGR (Intrauterine Growth Restriction) – intrauterine growth restriction – is a condition where the fetus is not growing at the expected rate for the gestational week. The causes can be poor placental function, maternal diseases, genetic factors and more. Treatment depends on the severity of the condition and gestational age: increased monitoring with frequent Doppler tests, rest, and in severe cases – planned early delivery. Early diagnosis through the third trimester scan enables rapid response and preservation of fetal health.
Doppler examination measures the speed and direction of blood flow in specific blood vessels. In the third trimester scan, we mainly check: the umbilical artery – reflecting placental resistance; the middle cerebral artery (MCA) – indicating the fetal condition and its ability to maintain blood flow to the brain; and sometimes liver veins as well. Abnormal Doppler values can precede changes in heart rate and assist in making early treatment decisions.
The third trimester scan is usually performed between week 28 and week 34 of pregnancy. The preferred timing is around weeks 30–32, as at this stage reliable measurements of fetal growth can be obtained and there is still time to act if necessary. In women with risk factors, additional follow-up examinations may be performed at higher frequency, according to the doctor's recommendation.
Ready to schedule an appointment for the third trimester scan?
A comprehensive and professional examination with answers to every question and peace of mind before delivery.