The first-trimester ultrasound is much more than just a scan for chromosomal screening. It is also the time when the weeks of your pregnancy are confirmed with the greatest accuracy, how many babies are in the womb, their early development is assessed, and some structural changes can be identified early on.
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First-trimester ultrasound
Author:
EM
Enf.ª Margarida LançaSpecialist Nurse in Maternal and Obstetric Health
Last updated 22 August 2026
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Pregnancy care and follow-up
- EMEnf.ª Margarida LançaSpecialist Nurse in Maternal and Obstetric HealthBook