The excellent sourcebook BEFORE WE ARE BORN, 4th Edition, presents a clear, concise account of human embryology, fertilization, week-by-week maturation of the embryo and fetus, development of the major organ systems, and much more! It's vividly illustrated with clinical photographs, scanning electron micrographs, and step-by-step drawings.
The best academic embryology book I have read ever, since it contains the fatus developing weeks in details, and not just that, but it adds the diseases and birth defects which goes along these weeks. And I believe in my specialist opinions as they see "before we are born" as an advance book.
Embryology is a pain, especially the first 3 weeks. A bilayer plate? Really? I'm supposed to be able to fully describe a bilayer plate? Didn't I just fully describe it by naming it?