To evaluate the percentage of severe heart defect diagnosed with the use of color Doppler at a routine fetal scan in the second trimester of pregnancy

Almost all women in Norway have a routine ultrasound examination in the second trimester, however, the detection rate of heart defect are only around 50%. In this study we use color Doppler at three different levels in the fetal heart; the four chamber view, the outlet of the aorta on on the level of the great arteries.

All heart defects at delivery are recorded and compared with the ultrasound findings.

Inclusion Criteria:

• Pregnant
• 2nd trimester

Exclusion Criteria:

• Unwilling

Pregnant women for routine examination in the 2nd trimester.

Data wil not be shared outside the research group. Results are published (see references).

The number of heart defects detected by color Doppler in the second trimester was compared to the number of major heart defects detected at birth to determine the sensitivity of the color Doppler examination to detect major heart defects in the second trimester.