Royal College of Obstetricians and Gynaecologists rules against trend . Some clinics are offering keepsake images from first 10 weeks . Advice says early-stage scans should not be done without medical reason . Slight heating effect produced by ultrasound is one subtle side effect . Colour and pulsed wave Doppler scans have such intensity and power output they are not recommended at all during as early as six weeks .
Royal College of Obstetricians and Gynaecologists rules against trend . Some clinics are offering keepsake images from as early as six weeks . Advice says early-stage scans should not be done without medical reason . Slight heating effect produced by ultrasound is one subtle side effect . Colour and pulsed wave Doppler scans have such intensity and power output they are not recommended at all during first 10 weeks .