THE ANATOMY SCAN
The anatomy scan is a comprehensive ultrasound examination performed during the second trimester of pregnancy, typically between weeks 18 and 22. This scan is a crucial part of prenatal care and is used to assess Baby’s development and check for any potential abnormalities. Here's what typically happens during an anatomy scan:
Preparation: You may be asked to arrive with a full bladder for the ultrasound, as this can help improve the quality of the images. Since this is a detailed ultrasound, be prepared for a longer appointment - perhaps 45 minutes or more if you are meeting with a provider afterwards.
Positioning: You'll be asked to lie on an examination table, and a special gel will be applied to your abdomen to help with the transmission of sound waves. Sometimes, the technician may also use a transvaginal ultrasound wand to get a closer look at the cervix. If so, with your permission, the technician will lay a sheet across your belly and the ultrasound wand will be inserted into the vagina.
Ultrasound Examination: The sonographer or ultrasound technician will use a handheld device called a transducer to send high-frequency sound waves into your abdomen. These sound waves bounce off Baby and other structures inside the uterus, creating images on a computer screen.
Visual Examination: The sonographer will carefully examine Baby's anatomy in detail, including the head, face, neck, chest, abdomen, spine, limbs, and various organs. They will measure specific structures to ensure they are growing at the expected rate.
Sex Determination: If you do not know, and wish to know the sex of Baby, the ultrasound technician may be able to provide this information during the anatomy scan, although it's not the primary purpose of the scan. If you do not yet know and DON’T wish to know the sex of the Baby, just inform the ultrasound technician at the beginning of the appointment (though they will likely ask you this anyway!).
Checking Organs and Structures: The anatomy scan assesses Baby's organs and structures, including the brain, heart, lungs, stomach, kidneys, bladder, and limbs. The sonographer will look for any abnormalities or signs of developmental issues.
Amniotic Fluid Levels: The amount of amniotic fluid surrounding Baby will be assessed, as both too much or too little amniotic fluid can be a concern.
Placental Location: The scan will also determine the location and health of the placenta, which is vital for Baby's nutrition and development. They will also check the umbilical cord, its blood flow, and the location of where it attaches to the placenta.
Uterine and Cervical Assessment: The sonographer may check the uterus and cervix for any abnormalities or signs of potential issues.
Fetal Position: Baby's position in the uterus will be noted, as well as any movements observed during the scan. Sometimes, Baby is in a position that makes it difficult to see certain structures - the ultrasound technician may ask you to turn different ways or move around to try to get Baby to move too. If they are still unable to see certain structures or do certain measurements, you might be asked to come back for a follow up ultrasound.
Images and Documentation: The sonographer will capture images of Baby’s anatomy and measure various structures. These images may be saved for your medical records.
Consultation: After the scan, you may have the opportunity to discuss the findings with your healthcare provider or another provider, who will explain the results and any recommendations for further testing or follow-up if needed. Every healthcare facility has a different process, so you may hear from your prenatal care provider or team with results within a few days after the ultrasound or at your next appointment. If you’re unclear how the results will be communicated to you, just ask!
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