BRS Embryology, Fourth Edition is a succinct outline-format review for USMLE and course exams, with USMLE-style questions at the end of each chapter and a comprehensive USMLE-style examination at the end of the book. The book also includes radiographs, sonograms, computed tomography scans, and photographs of various congenital malformations. This updated edition has a new organization: prefertilization through the embryonic period; system by system; genetic abnormalities; and teratology. The chapter on structural chromosomal abnormalities has been substantially revised. This edition's review questions are in the clinical vignette-based format of the current USMLE.

Prefertilization Events Sexual Reproduction, Chromosomes Week 1 of Human Development (Days 1-7) Fertilization, Cleavage and Blastocyst Formation Week 2 of Human Development (Days 8-14) Further Development of the Embryoblast, Further Development of the Trophoblast Embryonic Period (Weeks 3-8) General Considerations, Further Development of the Embryoblast Cardiovascular System Formation of Heart Tube, Primitive Heart Tube Dilatations Placenta and Amniotic Fluid Formation of the Placenta, Placental Components: Decidua Basalis and Villous Chori Nervous System Development of the Neural Tube, Neural Crest Cells Ear Overview, The Internal Ear Eye Development of Optic Vesicle, Development of Other Eye Structures Digestive System Derivatives of the Foregut, Derivatives of the Midgut Respiratory System Upper Respiratory System, Lower Respiratory System Head and Neck Pharyngeal Apparatus, Development of the Thyroid Gland Urinary System Development of the Metanephros, Relative Ascent of the Kidneys Female Reproductive System The Indifferent Embryo, Development of the Gonads Male Reproductive System The Indifferent Embryo, Development of the Gonads Integumentary System Skin, Hair and Nails Skeletal System Skull, Vertebral Column Muscular System Skeletal Muscle, Smooth Muscle Upper Limb Vasculature, Musculature Lower Limb Vasculature, Rotation of the Lower Limb Body Cavities Formation of the Intraembryonic Coelom, Partitioning of the Intraembryonic Coelom Pregnancy Endocrinology of Pregnancy, Pregnancy Dating Numerical Chromosomal Anomalies Polyploidy, Aneuploidy Structural Chromosomal Abnormalities Deletions, Microdeletions Single-Gene Inherited Diseases Autosomal Dominant Inheritance, Autosomal Recessive Inheritance Multifactorial Inherited Diseases Introduction, Type 1 Diabetes Teratology Infectious Agents, TORCH Infections Appendix Comprehensive Examination Figure and Table Credits