Few moments in life match the first glimpse of your baby on an ultrasound screen. But beyond the emotion, pregnancy sonography in Thane follows a carefully planned medical schedule — and knowing which scan happens when helps you catch every milestone and every warning sign at the right time. From the six-week dating scan to the final growth Doppler before delivery, each ultrasound answers a different question about your baby’s health. This guide walks you through the complete scan timeline, trimester by trimester, so you never miss one that matters.
First Trimester Scans: Dating Scan and NT Scan
Dating scan (6–9 weeks): The first ultrasound confirms the pregnancy is inside the uterus, checks the baby’s heartbeat, and fixes your accurate due date. Dating in the first trimester is the most precise it will ever be — later scans can be off by a week or more.
NT scan (11–13 weeks 6 days): The nuchal translucency scan measures the fluid at the back of the baby’s neck. Combined with a double marker blood test, it screens for chromosomal conditions like Down syndrome. The window for this scan is strict — miss it, and the screening cannot be done later with the same accuracy.
If you have spotting, pain, or a history of miscarriage, your doctor may advise an early viability scan even before six weeks. Our sonography department performs early pregnancy scans with same-day reporting.
Second Trimester: The Anomaly Scan Every Mother Must Have
The anomaly scan — also called the Level 2 scan or TIFFA (Targeted Imaging for Fetal Anomalies) — is done between 18 and 22 weeks and is the single most detailed ultrasound of pregnancy.
The sonologist systematically examines the baby’s brain, spine, heart chambers, kidneys, stomach, limbs and face, checks the position of the placenta, and measures the amniotic fluid. Around 18–20 weeks the baby’s organs are developed enough to assess clearly, yet there is still time to plan care if something needs attention.
A normal anomaly scan is deeply reassuring. An abnormal finding, caught at this stage, gives your obstetrician options — from specialist referral to planned delivery in a hospital equipped for newborn care. This is why doctors insist on it even in a completely healthy pregnancy.
Third Trimester: Growth Scans and Colour Doppler
Growth scan (28–32 weeks and near term): This scan tracks the baby’s weight, head and abdominal measurements, amniotic fluid levels and placental position. It answers the questions every obstetrician asks in the final stretch: is the baby growing on curve, and is there enough fluid?
Colour Doppler study: A Doppler ultrasound measures blood flow through the umbilical cord, the baby’s brain vessels and the uterine arteries. It becomes essential when the mother has high blood pressure, gestational diabetes, or when a growth scan suggests the baby is smaller than expected. Reduced cord flow is one of the earliest signs that a baby is under stress — detectable on Doppler days before other symptoms appear.
Kaizen Diagnostic Centre performs both growth scans and colour Doppler studies in Kalwa, so third-trimester monitoring doesn’t require travelling across Thane. You can book your scan appointment in advance and avoid waiting.
How to Prepare for Each Pregnancy Scan
Preparation is simple but scan-specific. Early pregnancy scans (before 10 weeks) usually need a comfortably full bladder — drink two to three glasses of water an hour before and avoid emptying your bladder. From the second trimester onwards, no special preparation is needed for most scans.
Carry your previous scan reports and your obstetrician’s referral note every time; comparing measurements across scans is how growth trends are read. Wear a two-piece outfit for easy access to the abdomen, and plan for 20–40 minutes — the anomaly scan can take longer if the baby’s position makes certain views difficult.
Timing matters more than most parents realise, so note your scan windows in your phone calendar as soon as your due date is confirmed. If a scan falls near a festival or holiday week, book a few days early rather than risk missing the window entirely.
One important note: sex determination is strictly prohibited in India under the PCPNDT Act. Ethical diagnostic centres will never disclose the baby’s sex, and every registered ultrasound clinic — including ours — follows this law without exception.
Frequently Asked Questions
How many ultrasound scans are needed during pregnancy?
A typical low-risk pregnancy needs four to five scans: a dating scan (6–9 weeks), NT scan (11–14 weeks), anomaly scan (18–22 weeks), and one or two growth scans in the third trimester. High-risk pregnancies may need additional scans and Doppler studies as advised by your obstetrician.
Is pregnancy sonography safe for the baby?
Yes. Ultrasound uses sound waves, not radiation, and decades of research have found no harm to the baby from routine diagnostic scans. Scans are performed only when medically indicated, following international safety guidelines.
What is the cost of a pregnancy sonography in Thane?
Costs vary by scan type — a dating scan costs less than a detailed anomaly scan or colour Doppler study. Contact Kaizen Diagnostic Centre in Kalwa at 970 299 3460 for current pricing and same-day appointment availability.
Book Your Pregnancy Scan in Kalwa, Thane
Every scan in pregnancy has its window — and the right scan at the right week protects both mother and baby. Kaizen Diagnostic Centre offers dating scans, NT scans, anomaly scans, growth scans and colour Doppler studies with experienced sonologists and prompt reporting. Have a question about which scan you’re due for? Reach out to our team — we’ll help you plan your schedule.
📞 Call: 970 299 3460
📍 Times House, Kalwa Naka, Kalwa (W), Thane
💬 WhatsApp us: https://wa.me/919702993460