Implantation Research Paper

While implantation occurs, blastocyst is being concerted into gastrula, in which three germ layers from and embryonic membranes develop. The beginning is when the inner cell mass differs into two layers which are the epiblast and the hypoblast. Both of these cells form four embryonic membranes which are the amnion, the yolk sac, allantois, the umbilical cord, and the chorion. The amnion provides a buoyant environment which protects the embryo from physical trauma and helps maintain a constant temperature. The yolk sac provides nutrition for the embryo, produces early blood cells and vessels, and is a source of germ cell that migrate to the embryo to seed the gonads. The allantois in humans is a structural base for the umbilical cord which links to the embryo and become part of the bladder. The umbilical cord contains the veins and arteries and is covered externally by the amniotic membrane. Last is the chorion which helps …show more content…
The first stage which is when a female begins having contractions, the second stage which is when she pushes the baby out, and the third stage when she delivers the placenta. During the first stage the female cervix will move forward and open so the baby will be born. By the end of the first stage the cervix would be completely dilated about ten centimeters in diameter. In the second stage is when you will be pushing your baby out, you may feel pain and some stinging once the baby is farther in the pelvis. The third stage is when you deliver the placenta which usually comes out with the bag of waters attached to it. Many hospitals use injections to release the placenta so it will not cause blood loss after birth of a child, but the injections may have some