What is a Fetal Anomaly Scan (Level 2 Ultrasound)?<\/h2>\n\n\n\n
A fetal anomaly scan is a detailed, high-resolution ultrasound usually performed during the second trimester. Unlike the brief “dating scans” you may have had in your first trimester, the anomaly scan is not a quick check-in. It is an exhaustive, systematic medical examination of your baby\u2019s anatomy.<\/p>\n\n\n\n
Using advanced 2D ultrasound technology (and sometimes 3D\/4D for specific clarifications), a fetal medicine expert or specialized sonographer will examine the baby\u2019s organs, bones, brain structures, and heart chambers. The goal is two-fold:<\/p>\n\n\n\n
- \n
- Growth Assessment:<\/strong> To confirm that the baby is growing normally and that measurements align with their gestational age.<\/li>\n\n\n\n
- Structural Screening:<\/strong> To screen for any structural abnormalities, congenital defects, or genetic markers that might require medical intervention before or immediately after birth.<\/li>\n<\/ol>\n\n\n\n
The scan also evaluates the maternal environment, including the position of the placenta, the volume of amniotic fluid, and the length of the cervix, ensuring the womb is a safe space for the baby to continue growing.<\/p>\n\n\n\n
When is the Best Time to Get the Anomaly Scan?<\/h2>\n\n\n\n
The medical consensus is that the anomaly scan should be performed between 18 and 22 weeks of pregnancy<\/strong>, with 20 weeks<\/strong> being the absolute “sweet spot.”<\/p>\n\n\n\n
Here is why timing matters so much for this specific ultrasound:<\/p>\n\n\n\n
1. The 18 to 22-Week Window<\/h3>\n\n\n\n
During this four-week window, two critical factors align: the baby is large enough for their internal organs to be clearly visible on the ultrasound monitor, and there is still an abundant amount of amniotic fluid surrounding them. Amniotic fluid acts like a liquid window; it transmits the sound waves of the ultrasound machine perfectly, allowing for crystal-clear, high-resolution images of the baby\u2019s tiny structures.<\/p>\n\n\n\n
2. What Happens if You Go Too Early? (Before 18 Weeks)<\/h3>\n\n\n\n
If you schedule the scan at 16 or 17 weeks, the baby is simply too small. Vital structures, particularly the intricate chambers of the heart and the specific folds of the brain, are not fully developed or are too tiny to be accurately assessed. The doctor may have to ask you to return a few weeks later to complete the scan, which can cause unnecessary anxiety.<\/p>\n\n\n\n
3. What Happens if You Go Too Late? (After 22 Weeks)<\/h3>\n\n\n\n
As your baby grows past 22 and 24 weeks, they begin to take up more space in the uterus, and the ratio of baby to amniotic fluid changes. The baby\u2019s bones also become denser (more calcified), which casts shadows on the ultrasound image. This makes it incredibly difficult for the sonographer to see “through” the ribs to properly examine the heart and lungs. Furthermore, if a severe abnormality is detected, discovering it later in the pregnancy limits the medical management and counseling options available to parents.<\/p>\n\n\n\n
\n
The Verdict:<\/strong> Aim to schedule your scan right as you hit the 19 to 20-week mark<\/strong>. This gives the sonographer the perfect balance of fetal size and fluid volume.<\/p>\n<\/blockquote>\n\n\n\n
Organ-by-Organ: What Does the Sonographer Look For?<\/h2>\n\n\n\n
The 20-week scan usually takes about 30 to 45 minutes. The sonographer will be quiet and highly focused during parts of the examination. Do not let this silence panic you\u2014they are running through a highly complex mental checklist.<\/p>\n\n\n\n
Anatomy Checked<\/strong><\/td> What the Doctor is Looking For<\/strong><\/td> Why it Matters<\/strong><\/td><\/tr><\/thead> Brain & Head<\/strong><\/td> Shape of the skull, ventricles, and cerebellum.<\/td> Rules out neural tube defects (like anencephaly) and ensures proper brain fluid drainage.<\/td><\/tr> Face<\/strong><\/td> The profile, nose bone, and upper lip.<\/td> Checks for conditions like cleft lip or palate, which helps pediatricians prepare for post-birth feeding.<\/td><\/tr> Heart<\/strong><\/td> The four chambers, valves, and major blood vessels (aorta and pulmonary artery).<\/td> Congenital heart defects are among the most common anomalies. Detailed fetal echocardiography within this scan saves lives.<\/td><\/tr> Spine<\/strong><\/td> The alignment of the vertebrae and the skin covering the back.<\/td> Ensures the spine is fully enclosed, ruling out Spina Bifida.<\/td><\/tr> Stomach & Kidneys<\/strong><\/td> Checks that the baby is swallowing fluid (filling the stomach) and that kidneys are producing urine (filling the bladder).<\/td> Confirms the digestive and urinary tracts are open and functioning.<\/td><\/tr> Limbs<\/strong><\/td> Three bones in each arm and leg, plus hands and feet.<\/td> Rules out skeletal dysplasias, missing limbs, or club feet.<\/td><\/tr> Placenta<\/strong><\/td> The location of the placenta in relation to the cervix.<\/td> If the placenta is covering the cervix (Placenta Previa), it can cause bleeding. The doctor will monitor this for later weeks.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n Dealing with “Scanxiety”: The Emotional Side of the Scan<\/h2>\n\n\n\n
While many parents look forward to the anomaly scan to see their baby\u2019s face, it is completely normal to feel a wave of dread or anxiety leading up to the appointment. In the medical community, this is casually referred to as “Scanxiety.”<\/p>\n\n\n\n
It is vital to remember that the vast majority of anomaly scans result in normal findings. If your report notes that fetal anatomy appears “unremarkable,” celebrate! In medical terminology, “unremarkable” means perfectly normal.<\/p>\n\n\n\n
What if a “Soft Marker” is Found?<\/h3>\n\n\n\n
Occasionally, a doctor might identify a “soft marker.” These are slight variations from the norm\u2014such as an echogenic bowel (a bright spot in the gut) or a choroid plexus cyst (a tiny fluid bubble in the brain).<\/p>\n\n\n\n
Do not panic. Soft markers are not birth defects. They are merely variations that, while sometimes linked to chromosomal issues, most often occur in perfectly healthy babies and resolve on their own before birth. If a soft marker is found, your fetal medicine specialist will gently guide you through the next steps, which may simply involve another scan a few weeks later to confirm the marker has vanished.<\/p>\n\n\n\n
Preparing for Your TIFFA Scan<\/h2>\n\n\n\n
Proper preparation can make the scan more comfortable for you and easier for the sonographer.<\/p>\n\n\n\n
- \n
- Hydration is Key:<\/strong> Unlike early pregnancy scans, you do not need an agonizingly full bladder. However, staying well-hydrated in the days leading up to the scan helps maintain clear amniotic fluid, which improves image quality.<\/li>\n\n\n\n
- Eat Normally:<\/strong> Fasting is not required. In fact, having a light meal or a sugary snack (like fruit juice) 30 minutes before the scan can wake the baby up and get them moving, making it easier for the doctor to see all angles.<\/li>\n\n\n\n
- Dress Comfortably:<\/strong> Wear a two-piece outfit (pants\/skirt and a top) rather than a dress, as you will only need to expose your belly.<\/li>\n\n\n\n
- Bring Previous Reports:<\/strong> Always carry your first-trimester NT scan reports and recent bloodwork so the fetal medicine expert has your complete medical history.<\/li>\n<\/ol>\n\n\n\n
![\"The](\"https:\/\/thedfmc.com\/blog\/wp-content\/uploads\/2026\/10\/The-20-Week-Fetal-Anomaly-Scan-1-1024x572.png\")
<\/figure>\n\n\n\nThe Importance of Specialized Care: Why Choose Dhiya Fertility and Maternity Clinic?<\/h2>\n\n\n\n
Not all ultrasound scans are created equal, and neither are the clinics that perform them. While a general radiologist is highly trained, the intricacies of fetal anatomy require sub-specialized expertise and deep clinical focus.<\/p>\n\n\n\n
This is why expectant mothers consistently choose dedicated healthcare centers like Dhiya Fertility and Maternity Clinic<\/strong>.<\/p>\n\n\n\n
When you book your anomaly scan at Dhiya Fertility and Maternity Clinic, you are not just getting a routine check; you are receiving care from specialists trained extensively in Fetal Medicine and maternal health. Dhiya Fertility and Maternity Clinic utilizes state-of-the-art ultrasound machines capable of detecting the most minute details of fetal development. Their specialists are experts at mapping the fetal heart, brain, and nervous system.<\/p>\n\n\n\n
More importantly, Dhiya Fertility and Maternity Clinic understands the deep emotional weight of pregnancy. If an anomaly or soft marker is detected, you aren’t just handed a report and sent away. The specialists at Dhiya Fertility and Maternity Clinic provide immediate, compassionate, and deeply knowledgeable counseling, outlining exact medical pathways and collaborating directly with your primary obstetrician every step of the way.<\/p>\n\n\n\n
Crucial Note for Indian Parents: The PCPNDT Act<\/h2>\n\n\n\n
For expecting parents in India, it is mandatory to note that prenatal sex determination is strictly prohibited and is a punishable criminal offense under the Pre-Conception and Pre-Natal Diagnostic Techniques (PCPNDT) Act, 1994<\/strong>.<\/p>\n\n\n\n
When you visit Dhiya Fertility and Maternity Clinic or any reputed clinic for your anomaly scan, you will be required to sign a consent form acknowledging this law. The sheer purpose of the 20-week TIFFA scan in India is to celebrate and safeguard the health and development of your child, regardless of gender.<\/p>\n\n\n\n
Conclusion<\/h2>\n\n\n\n
The 20-week fetal anomaly scan is a profound bridge between the early days of pregnancy and the final stretch toward birth. By scheduling it at the ideal time\u2014between 18 and 22 weeks\u2014you give your medical team the best possible window to ensure your baby is growing safely and strongly.<\/p>\n\n\n\n
Remember to breathe, trust in the expertise of specialized centers like Dhiya Fertility and Maternity Clinic<\/strong>, and allow yourself to enjoy the incredible experience of seeing your baby\u2019s tiny hands, feet, and heartbeat in remarkable detail.<\/p>\n\n\n\n
Frequently Asked Questions (FAQs)<\/h2>\n\n\n\n
1. Is the 20-week anomaly scan completely safe for my baby?<\/h3>\n\n\n\n
Yes. Ultrasounds use high-frequency sound waves, not ionizing radiation (like X-rays). They have been used safely in obstetrics for decades and pose no risk to you or your baby.<\/p>\n\n\n\n
2. Can an anomaly scan detect Down Syndrome or Autism?<\/h3>\n\n\n\n
The anomaly scan can detect physical structural abnormalities sometimes associated with Down Syndrome (like certain heart defects), but it cannot diagnose it definitively. A blood test (NIPT) or amniocentesis is required for a diagnosis. Autism cannot be detected via ultrasound, as it is a neurodevelopmental condition, not a structural brain defect.<\/p>\n\n\n\n
3. What if my baby is in the wrong position during the scan?<\/h3>\n\n\n\n
Babies are notoriously stubborn! If your baby is facing the wrong way and hiding their heart or face, the sonographer may ask you to take a short walk, drink some cold water, or jump lightly to encourage the baby to shift positions.<\/p>\n\n\n\n
4. What is the difference between a 2D and a 3D\/4D anomaly scan?<\/h3>\n\n\n\n
The standard medical anomaly scan is performed in 2D because it allows the doctor to see “through” the baby’s body to check internal organs. 3D and 4D (moving 3D) scans look at the surface of the baby (like their facial features). While 3D is great for parental bonding and keepsakes, 2D remains the gold standard for medical diagnosis.<\/p>\n\n\n\n
5. Does a normal anomaly scan guarantee a 100% healthy baby?<\/h3>\n\n\n\n
While a normal scan is incredibly reassuring and rules out major structural defects, it is not a 100% guarantee. Some conditions (like cerebral palsy, certain genetic disorders, or late-developing bowel issues) cannot be seen at 20 weeks. However, a clear scan drastically reduces the risk of major complications.<\/p>\n","protected":false},"excerpt":{"rendered":"
The 20-Week Fetal Anomaly Scan: When is the Best Time to Get It? Reaching the halfway mark of your pregnancy…<\/p>\n","protected":false},"author":5,"featured_media":917,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[1],"tags":[59,31,33,23,25,60,30],"class_list":["post-916","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-anomaly-scan","tag-best-gynaecologist-in-chennai","tag-best-hospital-for-normal-delivery-in-chennai","tag-dfmc","tag-fertility","tag-fetal-anomaly-scan","tag-normal-delivery-in-chennai"],"_links":{"self":[{"href":"https:\/\/thedfmc.com\/blog\/wp-json\/wp\/v2\/posts\/916","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thedfmc.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thedfmc.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thedfmc.com\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/thedfmc.com\/blog\/wp-json\/wp\/v2\/comments?post=916"}],"version-history":[{"count":1,"href":"https:\/\/thedfmc.com\/blog\/wp-json\/wp\/v2\/posts\/916\/revisions"}],"predecessor-version":[{"id":919,"href":"https:\/\/thedfmc.com\/blog\/wp-json\/wp\/v2\/posts\/916\/revisions\/919"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/thedfmc.com\/blog\/wp-json\/wp\/v2\/media\/917"}],"wp:attachment":[{"href":"https:\/\/thedfmc.com\/blog\/wp-json\/wp\/v2\/media?parent=916"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thedfmc.com\/blog\/wp-json\/wp\/v2\/categories?post=916"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thedfmc.com\/blog\/wp-json\/wp\/v2\/tags?post=916"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
- Eat Normally:<\/strong> Fasting is not required. In fact, having a light meal or a sugary snack (like fruit juice) 30 minutes before the scan can wake the baby up and get them moving, making it easier for the doctor to see all angles.<\/li>\n\n\n\n
- Structural Screening:<\/strong> To screen for any structural abnormalities, congenital defects, or genetic markers that might require medical intervention before or immediately after birth.<\/li>\n<\/ol>\n\n\n\n