Comparative fetal anatomy

Below are annotated images of a fetus at 10 weeks gestation, imaged in-vivo using 3D ultrasound imaging with CrystalVue™ and RealisticVue™ applied.

This specimen was matched to a Carnegie Stage 23 (CS23) embryo from the Carnegie Collection. Histological sections and a 3D embryological model of this CS 23 specimen has been used and adapted from B.S. de Bakker (Science), with permission and are used as a reference standard to validate and annotate anatomical the structures visualised using 3D ultrasound imaging.

1. A coronal section enabling visualisation of the stomach and bladder visible, which appear as hollow structures as well as the sonolucent fetal kidneys. Lung parenchyma also visible.
2. Histological section of a Carnegie Stage 23 embryo in the same plane as (A) enabling the anatomical structures to be cross-referenced.