Two resources I stumbled across recently:
The Multi-Dimensional Human Embryo is a collaboration funded by the National Institute of Child Health and Human Development (NICHD) to produce and make available over the internet a three-dimensional image reference of the Human Embryo based on magnetic resonance imaging. The collection of images is intended to serve students, researchers, clinicians, and the general public interested in studying and teaching human development.
Tons of images and videos (Quicktime) available
This website contains supplemental materials for William Larsen’s Human Embryology textbooks. Contents include:
1. Animations of developmental processes
2. Updates and links
3. Self-testing exercises
5. Instructor’s Manual