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AN80.1-7 | Fetal membranes — Glossary
Glossary — Fetal membranes
Key terms introduced in this module, in order of first appearance. Use this as a revision checklist.
| Term | Where Introduced |
|---|---|
| Placenta praevia | relevance |
| Abruptio placentae | relevance |
| Polyhydramnios | relevance |
| Oligohydramnios | relevance |
| Single umbilical artery (SUA) | relevance |
| Hydatidiform mole | relevance |
| trophoblast | recall |
| inner cell mass (embryoblast) | recall |
| Decidua | recall |
| haemochorial | recall |
| 1. Chorion | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Formation: | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| trophoblast + extraembryonic somatic mesoderm | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Types of chorion: | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Chorion frondosum (bushy chorion) | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| becomes the fetal part of the placenta | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Chorion laeve (smooth chorion) | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Functions: | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| hCG | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| HPL | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| 2. Amnion | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| epiblast | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Amniotic fluid: | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Sources: | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Removal: | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Functions of amniotic fluid: | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Polyhydramnios (>2 L): | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Oligohydramnios (<300 mL at term): | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Potter sequence | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| 3. Yolk Sac (Secondary) | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| vitello-intestinal (omphalomesenteric) duct | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Meckel's diverticulum | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| 4. Allantois | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| urachus | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| 5. Decidua | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Decidua basalis | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| maternal part of the placenta | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Decidua capsularis | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Decidua parietalis | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Placenta Praevia: | Part 1: Fetal Membranes — Chorion, Amnion, Yolk Sac, Allantois, Decidua (AN80.1) |
| Formation of the Umbilical Cord | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| connecting stalk | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Structure of the Normal Umbilical Cord: | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Length | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Diameter | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Vessels | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| 2 umbilical arteries + 1 umbilical vein | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Wharton's jelly | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Surface | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Spirals | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Blood flow direction: | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Umbilical arteries (×2): | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| deoxygenated blood | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Umbilical vein (×1): | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| oxygenated blood | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Clinical Correlations: | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Single umbilical artery (SUA): | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Short cord: | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Long cord: | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| cord prolapse | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| cord entanglement | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Cord prolapse: | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Nuchal cord: | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Velamentous insertion: | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| vasa praevia | Part 2: Umbilical Cord — Formation and Structure (AN80.2) |
| Formation of the Placenta | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Fetal part: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Maternal part: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Stages of villous development: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Primary villi (Day 13): | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Secondary villi (3rd week): | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Tertiary villi (3rd week onward): | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Cotyledons: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| cotyledons | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Gross features at term: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Diameter: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Thickness: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Weight: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Fetal surface: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Maternal surface: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Physiological Functions of the Placenta: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Respiration | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Nutrition | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Excretion | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Hormone production | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Immune protection | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| IgG | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Barrier | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Feto-Maternal Circulation: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Intervillous space: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| placental barrier | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Syncytiotrophoblast | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Cytotrophoblast | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Connective tissue of villus | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Endothelium of fetal capillary | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| What CROSSES the placental barrier: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| What does NOT cross: | Part 3: Placenta — Formation, Structure, Functions, Feto-Maternal Circulation (AN80.3) |
| Abnormal Placentation — Clinically Critical in India | clinical_pearl |
| Placenta Accreta Spectrum (PAS): | clinical_pearl |
| Accreta | clinical_pearl |
| Increta | clinical_pearl |
| Percreta | clinical_pearl |
| Risk factors (India): | clinical_pearl |
| Hydatidiform Mole (Gestational Trophoblastic Disease): | clinical_pearl |
| Complete mole: | clinical_pearl |
| Partial mole: | clinical_pearl |
| Key Takeaways — Fetal Membranes (AN80.1–80.3) | summary |
| Chorion (AN80.1): | summary |
| Amnion: | summary |
| Yolk sac: | summary |
| Decidua: | summary |
| Umbilical Cord (AN80.2): | summary |
| Placenta (AN80.3): | summary |
113 terms in this module