Abstract
First trimester ultrasound is done to confirm pregnancy and the location of the fetus,
identify the number of gestations and their viability, and most importantly, to date
the pregnancy as at this stage, it is less prone to biological variations. The natural
extension of this approach is screening the fetuses for chromosomal abnormalities,
and assessment for anomalies. Ultrasound guides invasive testing and helps in assessing
cervical length. This article focuses on the first trimester screening protocols for
assessing aneuploidies and for the early detection of fetal anomalies.
Keywords
Ultrasound - Fetus - First trimester - Aneuploidies
