When it comes to pregnancy care, getting the right imaging at the right time is essential. That’s why Exceptional Emergency Center offers on-site imaging, including pregnancy ultrasounds, so expectant parents can get answers quickly and conveniently. But how many ultrasounds can you expect during a standard pregnancy, and when do they typically happen? Throughout your pregnancy, you will need to have several ultrasounds. This consistent visualization helps us monitor how your baby is developing until your due date. Below, we’ll detail the series of ultrasound tests you must have during pregnancy and why.
Typical Ultrasound Schedule in a Low‑Risk Pregnancy
Most expectant mothers with uncomplicated pregnancies will undergo two to three ultrasounds at key points:
- First-trimester scan (6-13 weeks): for dating, viability, heartbeat, and number of fetuses
- Second-trimester anatomy scan (18-22 weeks): detailed evaluation of organs, placenta, fluid, and anatomy
- Optional third-trimester scan (28-40 weeks): to assess baby’s size, position, and well‑being if needed
First Trimester: Dating and Viability (6-13 Weeks)
The first ultrasound is typically done between 6 and 13 weeks of pregnancy and is often referred to as a dating scan. This scan plays a critical role in:
- Confirming a viable intrauterine pregnancy by detecting a fetal heartbeat, which is usually visible on ultrasound around 6–7 weeks.
- Estimating gestational age more accurately than the last menstrual period, especially important for women with irregular cycles.
- Identifying multiple pregnancies (twins, triplets, etc.) early affects prenatal care and monitoring needs.
- Checking the location of the embryo to rule out ectopic pregnancy (when the embryo implants outside the uterus).
Second Trimester: Anatomy Scan (18–22 Weeks)
The mid-pregnancy ultrasound, commonly known as the anatomy scan, is performed between 18 and 22 weeks. It is one of the most comprehensive prenatal assessments and includes:
- Detailed evaluation of fetal anatomy, including the brain, spine, heart, kidneys, bladder, stomach, limbs, and facial features.
- Checking fetal growth measurements, such as femur length and head circumference, to ensure the baby is developing on schedule.
- Assessing placental location, which is crucial to rule out placenta previa (a condition where the placenta covers the cervix).
- Measuring amniotic fluid volume, as too little (oligohydramnios) or too much (polyhydramnios) fluid can signal potential complications.
- Examining the umbilical cord, checking for abnormalities in insertion or vessel count.
Third Trimester: Follow-Up if Needed (28–40 Weeks)
Although not routine in low-risk pregnancies, third-trimester ultrasounds may be recommended based on prior scan results or the mother’s health. These later scans can be vital in:
- Monitoring fetal growth, particularly if there is concern about intrauterine growth restriction (IUGR) or macrosomia (very large baby).
- Checking fetal position as delivery approaches, whether head-down (cephalic), breech, transverse, or oblique, which influences birth planning.
- Evaluating placental function and confirming it has not developed calcifications or aged prematurely.
- Assessing biophysical profile (BPP) if there are concerns about fetal movement, fluid levels, or maternal conditions like preeclampsia or diabetes.
- Doppler studies may be added to assess blood flow in the umbilical cord or brain if there’s concern about fetal oxygenation.
When Do You Need Extra Ultrasounds During Pregnancy?
If your pregnancy is considered high-risk, due to conditions like gestational diabetes, high blood pressure, or concerns found in earlier ultrasounds, your provider may recommend more frequent imaging. These follow-up scans help track fetal development closely and allow early detection of any complications, giving your medical team time to intervene when necessary.
For example, if an ultrasound shows restricted fetal growth or abnormal fluid levels, additional ultrasounds may be scheduled to monitor your baby’s health more precisely. This close monitoring continues until the situation stabilizes or until delivery becomes the safest option.
Exceptional Emergency Center: Reliable Ultrasound
No two pregnancies are exactly alike. While most low-risk pregnancies require only two to three ultrasounds, others may need more frequent monitoring. That’s why having access to timely and expert imaging is essential.
At Exceptional Emergency Center, we provide on-site ultrasound imaging 24/7, no long waits, no referrals, just fast and accurate care when you need it most. Whether you’re confirming your pregnancy, checking on your baby’s development, or managing a high-risk situation, our experienced team is ready to help.