A pregnancy ultrasound uses sound waves to create images of your baby and structures within the uterus. It can answer different questions at different stages of pregnancy.
Each scan has a medical purpose. Knowing what it is intended to check can help you understand the images and results.
Depending on timing and the reason for the exam, ultrasound may help assess pregnancy location and dating, the number of babies, growth, anatomy, the placenta or amniotic fluid.
Not every scan checks all of these things. Some focus on one concern, while others assess several aspects of development.
For an abdominal scan, gel is applied to your belly and a handheld probe moves across the skin. A transvaginal scan may be recommended when a different view is needed, particularly early in pregnancy.
Let the person performing the exam know if you are uncomfortable. You can ask for an explanation or a pause.
Images sometimes need to be repeated or reviewed in more detail. Make sure you know who will explain the report and when to expect results. Some findings need follow-up testing; a scan alone does not answer every question about your baby’s health.
Confirm the appointment instructions, including bladder preparation. Bring previous scan reports if your care has moved between offices. Write down questions about the reason for the scan and what happens afterward.
If you are looking for pelvic imaging outside pregnancy, see Gynecologic Ultrasound.
It depends on the stage of pregnancy and the information needed. An abdominal scan uses a probe over your belly; a transvaginal scan uses a covered probe placed in the vagina. Discuss the recommended approach and any concerns before starting.
No. Ultrasound can show many aspects of development, but it cannot identify every condition. Your provider interprets the findings alongside your history and other tests.
Preparation varies with the type of scan. Follow the instructions for your appointment and call ahead if you have not received them.
