What is an OB/GYN Ultrasound?
An OB/GYN ultrasound — also known as a sonogram — is a safe, non-invasive imaging test that uses high-frequency sound waves to capture real-time, detailed depictions of your internal pelvic structures or a developing fetus. Because ultrasound technology relies entirely on sound waves rather than radiation, it carries no known risk for mothers or babies, making it a cornerstone of clinical monitoring in women’s health.
At Miami Women’s Center, we provide ultrasound imaging for both gynecological diagnostics (evaluating pelvic conditions) and obstetrical monitoring (tracking pregnancy) to give you and your provider a clear, accurate look at your health.
Request an AppointmentConditions Diagnosed with Gynecological Ultrasounds
Ultrasounds are not just for pregnancy. At Miami Women’s Center, our imaging is a frontline diagnostic tool used to investigate unexplained pelvic pain, irregular cycles, and structural changes. Gynecological scans help identify:
- Uterine fibroids & polyps: Detecting benign masses or tissue overgrowths growing within the uterine walls or cavity — see our fibroid management and polyp removal pages.
- Ovarian cysts & pelvic masses: Locating and measuring fluid-filled sacs or solid masses on the ovaries, related to our ovarian cyst management care.
- Endometriosis: Mapping internal signs of tissue growth outside the uterine cavity — learn more about our endometriosis and pelvic pain care.
- Abnormal bleeding: Pinpointing the physical causes behind heavily irregular or postmenopausal bleeding.
- IUD placement verification: Checking that an intrauterine device is positioned correctly inside the uterus.
Frequently Asked Questions About Ultrasounds
Ultrasound & Fetal Monitoring at Miami Women’s Center
What is the difference between a transabdominal and transvaginal ultrasound?
The method used depends on what your provider needs to visualize:
- Transabdominal ultrasound: The sonographer applies a clear gel to your lower stomach and gently glides a transducer across the area. It is completely painless and is used for mid-to-late pregnancy tracking and general pelvic scans.
- Transvaginal ultrasound: A slender, specialized probe is gently inserted into the vagina, providing a highly detailed, up-close view of the cervix, uterus, and ovaries. It is commonly used in early pregnancy or to investigate specific gynecological symptoms like pelvic pain.
How many routine ultrasounds are performed during a standard pregnancy?
For a standard, low-risk pregnancy, we typically perform two primary diagnostic scans:
- Dating ultrasound (first trimester): Completed around weeks 8 to 12 to confirm a viable intrauterine pregnancy, document fetal cardiac activity, and establish an accurate estimated due date.
- Anatomy survey scan (second trimester): Conducted between weeks 18 and 22. This is a thorough evaluation of the baby’s anatomy, organ development, growth rate, amniotic fluid volume, and placental placement.
Do I need a full bladder for an ultrasound?
It depends on the type of scan. For a transabdominal ultrasound in early pregnancy or a general pelvic scan, a full bladder pushes the intestines out of the way, creating a clearer view of the uterus and ovaries. Your care team will let you know whether to drink water before your specific appointment.
How long does an ultrasound appointment usually take?
Most ultrasound appointments take between 20 and 45 minutes, depending on the type of scan and what needs to be evaluated.
Are 3D or 4D ultrasounds different from a standard scan?
3D and 4D ultrasounds use the same sound wave technology but process the images differently to create more detailed or moving visuals. Your provider can discuss whether one of these is appropriate for your specific visit.
Can an ultrasound detect the sex of my baby?
In many cases, yes — the anatomy scan performed around weeks 18 to 22 can often determine fetal sex, though this isn’t guaranteed and depends on the baby’s position during the scan.
Will I get to see the ultrasound images afterward?
Yes, your provider will review the findings with you during your visit, and printed or digital images are often available to take home as a keepsake, depending on the type of scan.