article_snippet: Colour and pulsed wave Doppler involve greater average intensity and power outputs than B-mode and are not recommended at all during the first 10 weeks.
article_snippet: Colour and pulsed wave Doppler scans have such intensity and power output Colour and pulsed wave Doppler scans are not recommended at all during the first 10 weeks of pregnancy .
highlights_snippet: Colour and pulsed wave
highlights_snippet: Doppler scans have such intensity and power output Doppler scans are not recommended at all during first 10 weeks .