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