EMBRYOLOGY

Notes

EMBRYOLOGY LECTURE BLOCK 2.1: PLACENTA AND FETAL MEMBRANES 1ST SEMESTER ┃S.Y. 2026-2027 ┃BATCH SALIAGÚM 2030┃ILOILO DOCTORS’ COLLEGE OF MEDICINE LECTURER: DR. ANDERSON RAY A. ONG, MD, OUTLINE DECIDUA WEEK 5 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● Placenta Fetal Membranes Decidua Development of the Placenta Placental Circulation Placental Membrane Functions of the Placenta Placenta as an Allograft Placenta as an invasive tumor-like structure Parturition Endocrinology of Parturition Stages of Labor Fetal Membrane Amnion and amniotic sac Umbilical Vesicle Allantois Summary of Placenta and Fetal Membranes ● ● Endometrium of the uterus in a pregnant woman Functional layer of the endometrium that separates from the remainder of the uterus after parturition (childbirth) Note: 🔈Endometrium if not pregnant, Decidua if pregnant THREE REGIONS : 1. Decidua basalis: is the part of the decidua deep to the conceptus which forms the maternal part of the placenta. 2. Decidua capsularis: is the superficial part of the decidua overlying the conceptus. 3. Decidua parietalis: represents the remaining parts of the decidua. BLOCK 2 PLACENTA ● ● Fetomaternal Organ Primary site of nutrient and gas exchange betw...