An anatomy scan is a detailed prenatal imaging test. This routine ultrasound provides a comprehensive assessment of fetal development and well-being during pregnancy. It offers expectant parents and healthcare providers valuable insights into the baby’s growth and overall health.
What an Anatomy Scan Is
An anatomy scan is a comprehensive ultrasound performed during the second trimester of pregnancy, typically between 18 and 22 weeks. This timing is chosen because the baby’s organs have developed sufficiently to be clearly visualized. The scan uses high-frequency sound waves, inaudible to the human ear, which create images on a screen. The primary objectives of this scan include confirming gestational age, evaluating growth, assessing placenta position, and screening for anatomical abnormalities.
Key Areas Examined
During the anatomy scan, a sonographer meticulously examines various anatomical structures of the baby.
- The brain is carefully assessed for its structure, including the ventricles and other key components.
- The baby’s face is also visualized, with attention paid to the profile and lips.
- The heart undergoes a detailed examination to confirm the presence of its four chambers and the proper formation and connection of major blood vessels.
- The spine is evaluated for proper alignment and to ensure the skin completely covers it.
- The abdomen is surveyed to identify the stomach, kidneys, bladder, and bowel.
- The limbs, including arms, legs, hands, and feet, are examined, and the presence of fingers and toes is noted.
- If desired by the parents and visible, the external genitalia can also be assessed for sex determination.
- In addition to the baby’s anatomy, the scan evaluates the volume of amniotic fluid, which supports fetal development, and the precise position of the placenta.
Undergoing the Procedure
Preparing for an anatomy scan is generally straightforward. You may be asked to drink a specific amount of water before the appointment to ensure a full bladder, as this can help improve the clarity of the images. Wearing comfortable clothing is advisable, as you will likely need to expose your abdomen during the scan.
The procedure typically lasts between 30 to 60 minutes, though this can vary depending on the baby’s position and cooperation. During the scan, a gel is applied to your abdomen, which helps the sound waves transmit effectively between the transducer and your skin. A handheld device called a transducer is then gently moved across your belly, sending out sound waves and receiving the echoes to create images on a monitor. You may be able to view these images in real-time.
If the baby is in a challenging position for imaging, the sonographer might ask you to shift positions or take a short break to encourage movement. Ultrasound technology is considered safe for both the pregnant person and the baby, as it is non-invasive and does not use radiation.
Understanding the Findings
After the anatomy scan is completed, the sonographer may provide immediate feedback. A formal report detailing the findings will be sent to your healthcare provider, who will discuss the results with you. Most anatomy scans reveal no significant concerns, offering reassurance about the baby’s development.
If a potential finding is identified during the scan, it does not automatically mean there is a serious problem. Your healthcare provider will explain the finding and may recommend further testing, such as additional ultrasounds or specialized consultations with fetal medicine specialists. These steps help gather more information and determine the appropriate course of action.