Several factors can inhibit the quality of the image (raised BMI, foetal position, an empty or too full bladder), this will be explained to you on the day should we feel the image quality is reduced. We will always make every effort during the scan to get the clearest images of your baby, however babies can be unpredictable! If for any reason, we are unable to complete your scan at your appointment time we may encourage you to go for a walk, empty/fill your bladder or have a glass of cold water to try get baby moving around. If this still doesn’t work, we will rearrange your appointment for an alternative date and time, free of charge.