Midwife Nikki Khan replies: This is a form of ultrasound that monitors the blood flow from the placenta to your baby. It helps doctors to check that the baby is getting enough nutrients and that your placenta is working effectively. It

just on one side What it could be:Ectopic pregnancy: This is a rare but serious condition that happens when the fertilised egg implants itself outside the uterus, usually in one of the Fallopian tubes.What to do:Contact your GP immediately. The growing