The Smith County Veteran Services Office will be closed Monday through Monday, August 15-22, 2016. The Smith County Veterans Service Office will be closed Monday through Monday, August 15-22 for training, and will reopen on Tuesday, August 23 for normal business hours.
The first differentiation event in the formation of the placenta is the formation of trophoblasts, specialized epithelial cells, that ultimately form a physical connection between the embryo and the uterus. Allocation of cells to the trophoblast lineage is dependent on their position at the morula stage.
There it implants and starts to grow. From implantation until the end of the eighth week of pregnancy, the baby is called an embryo. From the ninth week of pregnancy until birth, it is called a fetus. What is the placenta? The placenta is formed from some of these rapidly dividing cells. The placenta functions as a life-support system during pregnancy. Oxygen, nutrients, and hormones from the mother are transferred across the placenta to reach the baby, and waste products from the baby are transferred to the mother for removal.