4D Ultrasound: Tracking Fetal Growth Across Pregnancy

     A 4D ultrasound is useful for monitoring fetal growth and detecting potential fetal organ abnormalities. It can also examine blood flow in specific fetal blood vessels and uterine arteries to predict the risk of preeclampsia. 

Gestational Age: 5 Weeks

     A small gestational sac appears as a black circle inside the uterine cavity, though features are not yet clearly defined. 

Gestational Age: 6 Weeks

     The fetus inside the gestational sac will start showing a detectable heartbeat. The doctor will also evaluate to rule out an ectopic pregnancy.

Gestational Age: 7-10 Weeks

     The fetus grows larger, and a yolk sac can be seen close to the fetus.

Gestational Age: 11-14 Weeks

     The fetus is clearly visible at this stage, allowing distinct evaluation of the head, body, arms, and legs. During screening for abnormalities, a specialist checks the nuchal translucency (thickness at the back of the neck), nasal bone, spine, stomach, bladder, and abdominal wall closure. Additionally, blood flow in fetal and uterine vessels is assessed to predict conditions like Preeclampsia

Gestational Age: 16-22 Weeks

     As the fetus grows, organs become much clearer. This stage is optimal for an anomaly ultrasound scan. Almost all organ structures can be evaluated (unless limited by abdominal wall thickness or fetal position), including gender determination and fetal heart checks. Placental location should also be checked for placenta previa.

Gestational Age: Over 22 Weeks

     The fetus rapidly accumulates body fat and grows fast. For parents wishing to see 4D ultrasound images, 26 - 32 weeks is the ideal period to capture clear, adorable images with an optimal amount of amniotic fluid.

Ultrasound during this period is also useful for monitoring growth and late-developing organ abnormalities, such as diaphragmatic hernia, lung cysts, hydronephrosis, or intestinal obstruction.

Recommendations for Parents Preparing for a 4D Ultrasound

• Drink plenty of plain water, at least 2 liters daily, for 1 week prior to the ultrasound scan.
• Get adequate rest, around 6-8 hours per day.
• Allow at least 30-45 minutes for the procedure (as it may take time to wait for the baby to change position).

Ultrasound examination is essential for monitoring growth and detecting potential fetal abnormalities.

Last updated

22/07/2020