When does ultrasound happen?

During pregnancy, an ultrasound can be performed at various stages:

1. Early Pregnancy (6-10 weeks): An early ultrasound helps confirm the pregnancy by visualising the gestational sac and/or an embryo with a heartbeat. It can provide an estimated gestational age and rule out conditions like an ectopic pregnancy.

2. First Trimester Screening (11-14 weeks): This ultrasound focuses on evaluating the fetus for potential physical abnormalities and assessing risk factors for chromosomal disorders. The nuchal translucency (NT) measurement and nasal bone evaluation are important markers during this scan.

3. Mid-Pregnancy Anatomy Scan (18-24 weeks): This is the most comprehensive ultrasound scan, also known as the anomaly scan. The sonographer carefully examines the anatomy of the fetus to assess growth, identify structural abnormalities, check internal organs and the spine, and evaluate placental and amniotic fluid levels.

4. Third Trimester Growth Scan (28-34 weeks): At this stage, the ultrasound primarily assesses fetal growth to detect potential issues requiring closer monitoring or medical intervention. The position of the placenta, umbilical cord, and estimated fetal weight are also reviewed.

5. Term Pregnancy Scan (after 37 weeks): In certain cases, an ultrasound near the end of pregnancy may be necessary to assess gestational age, placental health, amniotic fluid volume, and the baby's position in preparation for labour and delivery.

Always follow the specific recommendations provided by your healthcare provider regarding the schedule and purpose of ultrasound examinations during pregnancy.