The Mid-Pregnancy Ultrasound: What to Expect and What to Look For
Reviewed by: Dr. Bilal
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5 min read
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Apr 4, 2025
What is the Mid-Pregnancy Ultrasound?
A mid-pregnancy ultrasound which is also known as the anatomy scan, is a detailed imaging test. It is performed around the 20th week of pregnancy. It provides a complete, and overall look at the developing baby thus helping doctors assess the growth, organ development, and overall health of your baby.
In the past, it wasn’t a standard test however, today it is a standard part of prenatal care. It gives parents their first clear glimpse of their baby.
What is it Used For?
The main purpose of the mid-pregnancy ultrasound is to check if the baby is developing normally. It allows doctors to measure the baby’s size, check organ formation, and examine the placenta and amniotic fluid levels.
It can also help detect potential birth defects or abnormalities. Additionally, it is often the
moment when parents can find out their baby’s gender if they choose to. Furthermore, if any abnormalities are found, it helps parents decide the future of the pregnancy.
What Can You See in the 20-Week Ultrasound?
The 20-week ultrasound provides a detailed look at the baby’s anatomy. It typically includes assessments of the brain, heart, spine, kidneys, and limbs. It also evaluates facial features, including checking for conditions like cleft lip.
The ultrasound allows measurement of fetal growth parameters, such as head circumference and femur length, to ensure the baby is growing within a healthy range.
This scan also confirms the baby’s position and movement according to the age of the baby. Finding out the baby’s decision holds a crucial value in deciding the mode of birth (natural labor or C-section).
What Are Its Limitations?
Mid-pregnancy ultrasound is an undoubtedly powerful diagnostic tool however, it has its limitations. Some conditions may not be visible whereas some may develop later in pregnancy.
The accuracy of this scan depends on factors like the baby's position, maternal body type, and amniotic fluid levels. Furthermore, the scan can detect many abnormalities, but it cannot guarantee that a baby will be born without medical issues.
In some cases, further testing, such as genetic screening or additional ultrasounds, may be recommended for a more complete assessment.
Is the Mid-Pregnancy Ultrasound Safe?
Ultrasound imaging is considered a safe and non-invasive procedure for both the mother and baby. It does not use radiation, relying instead on sound waves to create images. Various studies have been conducted to assess the safety of mid-pregnancy ultrasound and they have declared it to be safe.
However, it is recommended that ultrasounds be performed only when medically necessary and should be conducted by trained professionals so that the results are highly accurate.
Conclusion
The mid-pregnancy ultrasound is an essential part of prenatal care as it offers details about fetal development. It helps reassure the parents and the doctors that the fetus is healthy and developing normally.
Yes, it has limitations however, its benefits far outweigh the concerns. Mid-pregnancy ultrasound can help detect potential abnormalities early, thus playing a vital role in ensuring a healthy pregnancy journey.
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