Can’t find all parts of the heart

Hailey • 21 • Amaria Rae born on 6/6/2018 • Type 1 Diabetic

When I went for my 28 week appointment they did a extra anatomy scan just to confirm that they could see everything but they still couldn’t see all 4 chambers of her heart. We could see her heart beating and everything but they told me that they still couldn’t see all of them. Is this something that happens often where they just can’t see it on the scan even this late in pregnancy?