Normal fetal echocardiography, foramen ovale and all that

I've managed to catch the foramen ovale ovale and flow across it in these B mode ultrasound and color Doppler images of the 4 chamber view in a late 3rd trimester fetus:

See below:

B mode fetal heart 4 chambers show foramen ovale pretty clearly. This fetus was really cooperative 😊.

The flow is from the right atrium to the left atrium as you may see in the color Doppler ultrasound images below:

I also managed a reasonably decent 3 vessel view:

One of the tricky things about fetal echo is that you don't always get the best views of everything. The 4 chambers was class, but 3 vessel view was passable 😉.

For more on normal fetal cardiac anatomy:

Normal fetal echocardiography

Fetal Echo in cardiac anomalies