# Genetic Insights Into Early Pregnancy Loss: A Case Study of Trisomy 22 and an Enlarged Yolk Sac

## TL;DR

This case study explores how an enlarged yolk sac and Trisomy 22 are linked to early pregnancy loss, emphasizing the role of genetic testing and sonography in managing such complications.

## Contribution

The study highlights the correlation between an enlarged yolk sac and Trisomy 22 in early pregnancy loss, advocating for genetic testing and sonography in clinical management.

## Key findings

- An enlarged yolk sac was found in a patient with Trisomy 22 and a history of recurrent pregnancy loss.
- Genetic testing confirmed Trisomy 22 as a cause of early pregnancy loss.
- Early detection through sonography and genetic analysis can inform pre-conception counseling and improve pregnancy outcomes.

## Abstract

The first trimester of pregnancy is crucial for organ development but also carries a high risk of complications, with early pregnancy loss being the most common. Anomalies in the yolk sac, the first extra-embryonic structure seen by ultrasonography, can indicate severe fetal growth abnormalities and are linked to higher rates of first-trimester loss. This case report details a 38-year-old woman with a history of recurrent pregnancy loss (RPL) who presented with per vaginal bleeding and mild abdominal pain. Transvaginal ultrasonography revealed a yolk sac larger than 10 mm, prompting further genetic investigation. Chromosomal microarray analysis confirmed Trisomy 22. The presence of an enlarged yolk sac, correlated with Trisomy 22, highlights the importance of early detection through sonography and genetic testing. This approach aids in managing RPL by identifying genetic causes, thereby informing pre-conception counseling and future pregnancy management. An abnormal yolk sac size necessitates thorough evaluation, including cytogenetic microarray testing and quantitative fluorescent-polymerase chain reaction analysis, to guide clinical decisions and improve pregnancy outcomes.