First-Trimester Ultrasound Screening in Routine Obstetric Practice

Area of Science:

• Medical Imaging
• Prenatal Diagnosis
• Fetal Medicine

Background:

• Technological advancements and increased expertise in fetal imaging have improved the detection of fetal structural development.
• First-trimester fetal anatomical assessment is a critical component of prenatal care.

Purpose of the Study:

• To emphasize the importance of standardized first-trimester fetal anatomical evaluation for all pregnant patients.
• To highlight the limitations of relying solely on cell-free DNA screening for aneuploidy.

Main Methods:

• Standardized ultrasound imaging protocol for fetal anatomy assessment at the end of the first trimester.
• Comparison of outcomes between comprehensive first-trimester ultrasound and cell-free DNA screening alone.

Main Results:

• First-trimester ultrasound identifies approximately half of all fetal structural malformations.
• Early anomaly detection facilitates genetic counseling, diagnostic testing, and specialist consultation.
• Omitting early anatomical evaluation can delay diagnosis until later in pregnancy.

Conclusions:

• First-trimester fetal anatomical assessment should be universally offered, irrespective of aneuploidy screening results.
• Early ultrasound improves the quality of obstetric care and preserves reproductive options.
• Cell-free DNA screening alone may miss significant structural anomalies detectable in the first trimester.