The 15-17. weekly fetal ultrasound examination is recommended for pregnant women who want to rule out serious developmental disorders in their unborn child as soon as possible. At this gestational age (compared to the first trimester), the fetus - in terms of size and development - reaches the age at which serious abnormalities can become clear (e.g. brain ventricle expansion, abnormal development of the posterior cranial fossa, abdominal cysts, etc.).

We recommend the 15-17. weekly screening also for those who, for some reason, did not have the opportunity for the first trimester ultrasound screening (weeks 11-13) - thus determining the gestational age and fetal abnormality screening - or during the first trimester ultrasound, the fetal occiput fold (nuchal translucency - NT ) was widened or the chromosome risk estimate obtained during the combined test showed a high risk.

The 15-17. during the weekly ultrasound screening, we measure the body parts of the fetus, based on which we specify the gestational age. We observe the vital functions of the fetus, examine the body contours of the fetus, check in detail the integrity and healthy development of the organs and body parts. We look for signs that may indicate the presence of some abnormality or chromosomal defect. During the examination, we check the position of the placenta and the amount of amniotic fluid.

During examinations, it must always be kept in mind that the organs of the fetus undergo continuous development during the 9 months and change in shape, size, and therefore also in detectability according to the gestational age.

The Hungarian laws in force require 2nd trimester abnormality screening between the 18th and 19th. are prescribed in the 15th to 17th week of pregnancy, so expectant mothers weekly screening cannot replace it.