The aim of a pregnancy ultrasonography scan is to observe the development of the unborn baby and detect any abnormalities and disorders during the pregnancy. The ultrasound is carried out either vaginally or through the abdomen. Three ultrasound scans are usually carried out in pregnancies where there are no complications.


  • First trimester (10th-13th week of pregnancy): This assesses how normal and advanced the pregnancy is. It will show if the baby is of reduced size, and if patients are having a multiple pregnancy or not. Measurement of the neck skin thickness can also detect any chromosome abnormalities (Down syndrome).
  • Second trimester (20th-23rd week of pregnancy): This assesses how the baby is growing and the amount of amniotic fluid. Malformations of the head, brain, spine, heart, kidneys, stomach and limbs are also visible. It will also show the position of the placenta (afterbirth), which may provide information on possible causes for bleeding in the later stages of pregnancy.
  • Third semester (30th-34th week of pregnancy): This again assesses how the baby is growing and the amount of amniotic fluid. The baby's position becomes an important factor as the due date approaches. If it is in breech position, it should still turn before birth.

Why choose Hirslanden


Prenatal ultrasonography is a key specialisation at Hirslanden, the largest private hospital group in Switzerland. Our prenatal ultrasonography specialists are renowned for their expertise and many years of experience.


You can expect comfortable rooms and a modern infrastructure as well as the highest standards in medicine and care.


We will help you throughout your entire stay, organising additional services such as translators and interpreters, transport, and overnight hotel stays for you and your relatives, and addressing all your administrative questions.


A personal contact from the Hirslanden International team will take care of your needs from the time that you first contact us to arrange an appointment through to the end of your treatment.


Contact us – we are happy to help you!