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SOURCES:
ACOG: “Ultrasound Exams.”
Australasian Journal of Ultrasound in Medicine: “Accuracy of sonographic fetal gender determination: predictions made by sonographers during routine obstetric ultrasound scans.”
Beth Israel Deaconess Hospital: “Ultrasounds During Pregnancy: How Many and How Often?”
Facts, Views & Vision: “A short history of sonography.”
Johns Hopkins: “Pelvic ultrasound.”
Mayo Clinic: “Fetal Ultrasound.”
PennMedicine: “Pregnant over 35: Here’s What Your 20-Week Ultrasound Can Show You.”
Rebecca Jackson, MD, assistant professor of obstetrics and gynecology, Sidney Kimmel Medical College, Thomas Jefferson University.
Stanford Children’s Health: “Ultrasound in Pregnancy.”
UT Southwestern Medical Center: “Why to avoid ‘keepsake’ 3-D and 4-D ultrasounds.”