Nikolas
Created page with "== Learning objectives == * Describe the differentiation of the trophoblast * What is the amniotic cavity? * What occurs during the lacunar stage of the trophoblast? * What does the primitive yolk sac arise from? * Describe the establishment of the uteroplacental circulation * Where does the chorionic cavity arise? * Which structure will eventually give rise to the umbilical cord? * What occurs during the decidua reaction, and what is its purpose? * Describe the structu..."
