Why Do Anomaly Scan in Pregnancy?
Explore why anomaly scan matters in mid pregnancy, what it checks for, how to prepare, and what results can mean, with practical guidance from Scanner Check.
Anomaly scan is a prenatal ultrasound performed around 18 to 21 weeks of pregnancy to assess fetal anatomy and growth.
Why do anomaly scan and what it reveals
Anomaly scan is performed during mid pregnancy to examine the baby's anatomy and growth. It is typically scheduled around 18 to 21 weeks and uses ultrasound to create detailed images of the fetus. This scan helps identify major structural differences, confirm gestational age, check the placenta's position, and assess amniotic fluid. The primary purpose of this exam is to answer why do anomaly scan and what it reveals about fetal development and overall pregnancy health. According to Scanner Check, this information supports informed decisions and helps families prepare for the next steps, whether that means specialized care, additional testing, or counseling. While the scan can reveal many conditions, it is not a guarantee that every issue will be found. Some problems are subtle, depend on fetal position, and may require follow up with additional tests later in pregnancy. The result should be interpreted in context with a clinician who knows your medical history and the rest of the pregnancy plan.
Common Questions
What is an anomaly scan and what does it check?
An anomaly scan is a mid pregnancy ultrasound used to examine the baby's anatomy and growth. It checks major body systems such as the brain, spine, heart, abdomen, limbs, placenta, and amniotic fluid. The goal is to identify any structural differences that might require further testing or care planning.
An anomaly scan is a mid pregnancy ultrasound that looks at the baby's anatomy for major structures and growth, to help guide care if anything unusual is found.
When is the anomaly scan usually performed?
The anomaly scan is typically performed during the mid pregnancy window, around 18 to 21 weeks of gestation. Your healthcare team will schedule it based on your pregnancy timeline and any prior findings.
Most people have this scan in the middle of pregnancy, usually between about 18 and 21 weeks.
Can anomaly scan detect all birth defects?
The anomaly scan detects many major structural issues but cannot identify every birth defect or genetic condition. Some problems are not visible in the scan, or depend on fetal position and timing. Additional testing may be recommended if concerns arise.
It detects many major problems but not every birth defect; additional tests may be needed for unclear findings.
What happens if an anomaly is detected during the scan?
If an anomaly is suspected, your care team will discuss next steps, which may include more detailed imaging or referrals to specialists. Genetic counseling or diagnostic testing might be offered depending on the findings and your choices.
If something looks unusual, you’ll talk with your doctors about follow up tests and possible referrals to specialists.
Is anomaly scan safe for mother and baby?
The scan uses ultrasound, which is considered safe when performed by trained professionals. It is noninvasive and does not use ionizing radiation. The goal is to obtain diagnostic information while minimizing any discomfort or risk.
Yes. It is a safe, noninvasive ultrasound used to check the baby's development.
Should I prepare for the anomaly scan?
Usually no special preparation is required. Wear comfortable clothing, bring medical records, and prepare questions for your clinician. If advised, you may be asked to adjust your schedule or timing for optimal views.
Wear comfy clothes and bring any medical records; ask questions so you understand what is seen.
Key Takeaways
- Understand that anomaly scans assess major fetal structures and growth
- Ask about follow up tests if something unusual is seen
- Results are interpreted by your clinician in context of overall pregnancy
- Anomaly scan is safe and noninvasive
- Prepare questions and bring relevant records to the appointment