Whole Exome Sequencing: Applications in Prenatal Genetics

Area of Science:

• Medical Genetics
• Fetal Medicine
• Genomic Diagnostics

Background:

• Prenatal diagnosis of fetal abnormalities often lacks specific etiological identification.
• Advancements in in utero fetal therapy necessitate precise genetic diagnoses.
• Whole exome sequencing (WES) offers a comprehensive genetic analysis approach.

Purpose of the Study:

• To review the current literature on prenatal WES.
• To outline clinical indications and challenges associated with prenatal WES.
• To discuss ethical considerations and future directions for prenatal WES.

Main Methods:

• Literature review of studies on prenatal WES.
• Analysis of clinical utility, diagnostic yield, and interpretation challenges.
• Discussion of ethical implications and future research priorities.

Main Results:

• Prenatal WES can increase diagnostic yield in fetuses with unexplained sonographic abnormalities.
• Interpretation of variants of unknown significance (VUS) presents a significant counseling challenge.
• Ethical considerations include informed consent and implications of incidental findings.

Conclusions:

• Prenatal WES is a valuable tool for diagnosing fetal conditions, guiding family counseling, and informing treatment.
• Addressing challenges in VUS interpretation and ethical issues is critical for widespread adoption.
• Future research should focus on improving variant classification and understanding the long-term impact of prenatal WES.