Development of embryo and fetusDefinition1. embryo: ≤ 8 weeks2..Fetus: ≥ 9 weeks, humanshape
Development of embryo and fetus • Definition 1. embryo: ≤ 8 weeks 2. Fetus: ≥ 9 weeks, human shape
Development of embryo and fetusPhysiology of fetus1. Circulation1) fetus ←→placenta←→ mater2) 1 umbilical vein (full of oxygen)2 umbilical artery (lack ofoxygen)3)Mixed blood (vein and artery)
Development of embryo and fetus • Physiology of fetus 1. Circulation 1) fetus ←→placenta←→ mater 2) 1 umbilical vein (full of oxygen), 2 umbilical artery (lack of oxygen) 3) Mixed blood (vein and artery)
HeadDuctusarsarteriossSUOAortasanacaaPulmonayarteyForamenPulntonayovaleRAveinPulmonaryLungveininferiorvena cavaLiverDuctusvenosusUmbilicalveinUmbilicalPlacentaarteeyAbdvisceratrunklowe
Development of embryo and fetus
Development of embryoand fetus2. Hematology1)ErythropoiesisFrom yolk sac: 3 weeksFrom liver: 10 weeksFrom bone marrow and spleen:term (90%)EPO production: 32nd week
Development of embryo and fetus 2. Hematology 1) Erythropoiesis From yolk sac: 3 weeks From liver: 10 weeks From bone marrow and spleen: term (90%) EPO production: 32nd week
Development of embryo and fetus2) Fetal hemoglobinFetal hemoglobin: early pregnancyAdult hemoglobin: 32nd weekTerm: fetal type Hb 25%3) White cellsLeukocytes: 8 weekLymphocytes (antibodyproduction):12week, thymus and spleen
Development of embryo and fetus 2) Fetal hemoglobin Fetal hemoglobin: early pregnancy Adult hemoglobin: 32nd week Term: fetal type Hb 25% 3) White cells Leukocytes: 8 week Lymphocytes (antibody production): 12 week, thymus and spleen