Patient's question:
Sure, here is the translation of the content you provided:```
No
```
Doctor's answer:
4D color Doppler ultrasound is three-dimensional and provides much clearer images than a regular color Doppler ultrasound. The best gestational week is around 4 months, but it's a bit late now. If the fetal position is not good, it might not be visible. If it's not visible, you can move around a bit and return for a second ultrasound.