First ultrasound: 5–7 weeks

This early scan confirms the pregnancy, rules out an ectopic pregnancy, checks the embryo’s heartbeat, and determines the number of embryos. It is often recommended when medically indicated, such as in cases of bleeding or pain, or as part of an IVF treatment plan.

First-trimester screening: 11–14 weeks

This is an essential examination during the first trimester. The doctor assesses the exact gestational age, nuchal translucency, which can indicate an increased risk of chromosomal abnormalities, the baby’s main anatomical structures, and the heartbeat.

The ultrasound is combined with a blood test to provide a more comprehensive assessment of potential risks.

Second-trimester screening: 18–21 weeks

This is the most informative stage for a detailed examination of the baby’s anatomy.

The doctor examines the brain, heart, stomach, intestines, and kidneys, as well as the limbs and bones. The scan also assesses the structure and position of the placenta, the amount of amniotic fluid, and the cervix.

The baby’s sex can usually be identified at this stage.

Third ultrasound: when recommended

A third ultrasound is scheduled individually, most often between 30 and 34 weeks, to assess whether the baby’s size corresponds to the gestational age.

The doctor also examines the placenta, the amount of amniotic fluid, the baby’s position, and blood flow in relevant vessels.

Additional examinations, such as Doppler ultrasound, cervical length measurement, or a follow-up scan before delivery, may also be recommended depending on the situation.

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