Epistemis

Embryology — Placenta and Fetal Membranes

Embryology · Basic Sciences

How it begins

La placenta es el órgano de mayor complejidad y trascendencia del embarazo: mediaador del intercambio fisiológico entre la circulación materna y la fetal, fuente de hormonas esenciales para el mantenimiento del embarazo y barrera selectiva frente a patógenos e inmunógenos. Su desarrollo es un proceso progresivo que abarca desde la segunda semana hasta las 12-16 semanas cuando la placenta adquiere su morfología…

What it covers

  1. Development of Chorial Villi
  2. · The Three Generations of Villi
  3. · Microscopic Structure of Mature Villus (Term)
  4. The Trophoblast in Detail
  5. · Trophoblast Classification
  6. · Remodeling of the Spiral Arteries by EVT
  7. · Maternal Immunological Tolerance to Trophoblast
  8. Anatomy of the Mature Placenta
  9. · The Corial Plate (Fetal Face)
  10. · The Basal Plate (Maternal Face)
  11. The Placental Barrier
  12. · Placental Transfer Mechanisms
  13. Functions of the Placenta
  14. · Respiratory Exchange Function
  15. · Nutritional Function
  16. Endocrine Function of the Placenta
  17. Amnion and Amniotic Fluid
  18. · Amniotic Fluid — Production, Circulation and Composition
  19. · Volume and Composition of Amniotic Fluid
  20. Yolk Sac, Allantois and Chorioamniotic Membranes
  21. · The Secondary Yolk Sac — Evolution and Destiny
  22. · The Allantois — Evolution and the Median Umbilical Ligament
  23. · Chorioamniotic Fusion and Extraembryonic Coelom Obliteration
  24. The Umbilical Cord
  25. · Structure of the Normal Umbilical Cord
  26. The Decidua — Transformed Endometrium
  27. · Types of Decidua
  28. · Decidual Cells
  29. Fetoplacental Circulation
  30. · Fetal Blood Journey
  31. The Three Fetal Physiological Shunts
  32. Circulatory Changes at Birth
  33. · Post-Natal Anatomical Changes in Vascular Structures
  34. Placental Pathology
  35. Cord and Membrane Pathology
  36. · Amniotic Band Syndrome (ADAM)
  37. Rh Isoimmunization and TORCH Infections
  38. · Rh Isoimmunization — Feto-Neonatal Hemolytic Disease (NHFD)
  39. · TORCH Infections — Vertical Transplacental Transmission
  40. Integrated Summary
  41. · Chronology of Placental Development and Membranes

The complete study guide is in the app

This page summarizes the outline. The full interactive study guide —with high-yield diagrams, clinical tables, and board review cases— can be read inside Epistemis, completely offline and ad-free.

Subject
Embryology
Category
Basic Sciences
Type
Study Guide
Sections
41
Reviewed
2026-08-02
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