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Full cheeks
- ... before your test so that your bladder is full. A blood test or cheek swab usually don't require any preparation. If ...
- ... about how to prepare. A blood test or cheek swab usually don't require any preparation. For a CVS or amniocentesis, you may need to drink extra fluid and not urinate before your test so that your bladder is full. Are there any risks to the test? The ...
- ... will insert a sterile swab into your baby's cheek and swirl for several seconds. The swab will ... the test to make sure you have a full bladder. This helps move the uterus into a ...