The first few weeks of pregnancy are often filled with excitement and anxiety. A viability scan, usually performed between 6 and 9 weeks of pregnancy, is one of the most important ultrasound examinations during this period.

The scan confirms whether the pregnancy is developing normally by identifying the gestational sac, yolk sac, embryo, and fetal heartbeat. It also helps determine the exact gestational age and excludes conditions such as ectopic pregnancy or early pregnancy failure.

Early pregnancy failure occurs when the pregnancy does not progress as expected. However, it is important to remember that a single early ultrasound may not always provide a definitive answer. In many cases, a follow-up scan after 7–14 days is necessary before making a diagnosis.

Accurate diagnosis requires adherence to internationally accepted ultrasound criteria to avoid misdiagnosis of a potentially viable pregnancy.

The Nuchal Translucency (NT) Scan is performed between 11 weeks and 13 weeks + 6 days of pregnancy. It is one of the most valuable screening tests in early pregnancy.

The scan measures the fluid-filled space behind the baby's neck and evaluates several important anatomical markers. Combined with maternal age and blood tests, it helps estimate the risk of chromosomal conditions such as Down syndrome.

Beyond screening for chromosomal abnormalities, the NT scan also assesses early fetal anatomy, confirms fetal viability, determines gestational age, and identifies multiple pregnancies.

An increased NT measurement does not necessarily mean that the baby has a genetic disorder, but it may indicate the need for further evaluation and counselling.

The Anomaly Scan, also known as the Level II Scan, is one of the most important ultrasound examinations during pregnancy. It can be performed between 18 and 24 weeks of gestation, although the ideal time is around 20–22 weeks, with approximately 21 weeks often providing the best opportunity for a comprehensive evaluation.

This detailed examination carefully assesses your baby's major organ systems, including the brain, face, spine, heart, lungs, diaphragm, abdomen, stomach, kidneys, urinary bladder, limbs, hands, feet, placenta, umbilical cord, and amniotic fluid. The scan also evaluates fetal growth and overall well-being.

One important aspect that many parents are unaware of is that the quality of the examination depends significantly on the baby's position. Babies frequently change position, and certain structures may not be clearly visible during a single examination. To obtain the best possible images, you may be asked to walk around, change your position, or wait for some time before the scan is continued. In some cases, a repeat visit on another day may be necessary to complete the examination. This is a normal part of high-quality fetal imaging and should not be interpreted as a cause for concern.

The primary aim of the anomaly scan is to identify structural abnormalities, assess normal fetal development, and detect conditions that may require further evaluation, counselling, specialised pregnancy care, or treatment after birth. Fortunately, the majority of anomaly scans are reassuring and demonstrate normal fetal development.

A soft marker is a subtle ultrasound finding that, by itself, is usually not a birth defect. These markers may be seen in completely healthy babies but can sometimes be associated with an increased risk of certain chromosomal conditions.

Examples include:

• Echogenic intracardiac focus (EIF)
• Mild renal pelvic dilatation
• Choroid plexus cyst
• Echogenic bowel
• Short femur or humerus
• Thickened nuchal fold

The significance of a soft marker depends on whether it is isolated or associated with other ultrasound findings, maternal age, and previous screening results.

In many pregnancies, isolated soft markers require no treatment and often resolve naturally before birth.

Müllerian anomalies are congenital abnormalities of the uterus that occur during fetal development. Many women remain unaware of these conditions until they experience infertility, recurrent miscarriages, or pregnancy complications.

Common uterine anomalies include a septate uterus, bicornuate uterus, unicornuate uterus, and uterus didelphys. Accurate diagnosis is important because some anomalies, particularly a septate uterus, can be successfully treated to improve reproductive outcomes.

Ultrasound, especially 3D transvaginal ultrasound, has become the preferred first-line imaging modality for evaluating uterine anatomy. It provides excellent visualization of both the uterine cavity and external contour, helping differentiate between various Müllerian anomalies.

Ultrasound plays a central role in the evaluation of infertility. A comprehensive fertility scan assesses the uterus, endometrium, ovaries, ovarian reserve, and pelvic anatomy while identifying conditions that may affect conception.

3D Transvaginal Ultrasound provides additional information by accurately evaluating the uterine cavity, detecting congenital uterine anomalies, submucosal fibroids, and endometrial polyps that may interfere with implantation.

Depending on the clinical situation, ultrasound can also monitor follicular development, ovulation, and endometrial receptivity during fertility treatment.

An ectopic pregnancy occurs when a fertilized egg implants outside the uterine cavity, most commonly within the fallopian tube. It is a potentially life-threatening condition if not diagnosed early.

Women may present with delayed periods, abdominal pain, vaginal bleeding, or shoulder pain, although some have minimal symptoms.

Transvaginal ultrasound combined with serum beta-hCG plays a crucial role in early diagnosis. The scan looks for an intrauterine pregnancy, adnexal masses, and free fluid within the pelvis.

Early diagnosis allows timely medical or surgical treatment while reducing complications and preserving future fertility whenever possible.

Ovarian cysts are common and are often discovered during routine ultrasound examinations. Most are functional cysts related to the normal menstrual cycle and resolve without treatment.

Ultrasound helps determine the size, appearance, and internal characteristics of a cyst, allowing differentiation between simple cysts, haemorrhagic cysts, endometriomas, dermoid cysts, and cystic ovarian tumours.

Most simple ovarian cysts require only observation, while complex cysts or persistent lesions may need further evaluation or surgical consultation.

Polycystic Ovary Syndrome (PCOS) is one of the most common hormonal disorders affecting women of reproductive age. Symptoms may include irregular periods, acne, excessive hair growth, difficulty conceiving, and weight gain.

Ultrasound may demonstrate enlarged ovaries containing multiple small follicles arranged around the periphery. However, PCOS cannot be diagnosed by ultrasound alone. Diagnosis is based on clinical findings, hormonal evaluation, and ultrasound features using accepted diagnostic criteria.

Lifestyle modification, weight management, and appropriate medical treatment can significantly improve symptoms and fertility outcomes.

Endometrial polyps are localized overgrowths of the lining of the uterus. They commonly present with abnormal uterine bleeding, intermenstrual spotting, or infertility, although many women have no symptoms.

Transvaginal ultrasound is often the first investigation and may identify a focal lesion within the endometrial cavity. Colour Doppler may demonstrate a characteristic single feeding vessel, increasing diagnostic confidence. In selected cases, saline infusion sonography or hysteroscopy may be recommended for further evaluation.

Removal of symptomatic polyps may improve bleeding symptoms and enhance fertility in appropriately selected patients.

A ganglion cyst is a common, non-cancerous fluid-filled swelling that usually develops around the wrist, hand, ankle, or foot.

Musculoskeletal Ultrasound (MSK USG) is an excellent imaging tool for evaluating ganglion cysts. It accurately identifies the cyst, determines its size, confirms its fluid nature, and demonstrates its relationship with nearby tendons, joints, and nerves.

Ultrasound also helps differentiate ganglion cysts from solid soft tissue masses that may require different treatment.

In selected patients, ultrasound can guide needle aspiration safely and accurately.

Tenosynovitis refers to inflammation of the tendon sheath and is a common cause of pain, swelling, and restricted movement around joints.

Musculoskeletal Ultrasound allows dynamic evaluation of tendons during movement, making it particularly useful for diagnosing tenosynovitis.

Ultrasound can demonstrate:

• Thickening of the tendon sheath
• Excess fluid around the tendon
• Increased blood flow indicating active inflammation
• Partial tendon tears
• Associated ganglion cysts or tendon abnormalities

Because ultrasound provides real-time imaging, it also plays an important role in guiding injections when conservative treatment is insufficient.