Human life begins when the marital problems of life or the human embryo. It is subtle and delicate. Although current scientific knowledge to provide information that can be used as criteria to some degree. But even at the international level, it was the perfect conclusion. Each country would be to manage the various laws, regulations or practices friendly to the current knowledge. We note that the development of the embryo. (Development), since When germ cells (Eggs and sperm) with water to remove DNA from the parents of each half together in a single cell with chromosomes in 23 pairs, this is an egg that has been fertilized (fertilized egg, also known as a zygote. ) From then onwards, the cells will divide indefinitely for about two weeks. Some offer reproductive biologists use the term pre-embryo for the embryo at this stage, rather than use the term embryo practical reasons rather than scientific reasons , whether it be called anything. In the first phase, the cell is divided into two, four, eight cells are cells that divide if we split apart. Each cell will also be developed into embryos by itself. (This is the reason of gestation) , but at some stage 16 cells will begin to see changes in this small group of cells that have the same in every cell, it starts with some cells develop themselves differently. (Differentiate) In addition, the ability of the cells to develop into the embryo itself is reduced. Some cells began to specific functions of cells, such as cells that are external to recognize themselves in the "outside" and prepare to develop into the placenta and other tissues that encapsulates and protects the embryo to grow to the drinker. the second week All cells are detached from the shell of the egg cell. And embedded on the wall of the womb of the mother. The mother's body to recognize the existence of the embryo and the first pregnancy to nourish the embryo. However, the cells are "inside" embryos, each cell has the ability to turn into any organ in the body. Or even break out into an embryo of a multiple gestation, it is possible. In this phase, we will never know what's inside this cell. Which cells will become part of the human body. And which cells become cluttered. (Not part of the human body), but on the day of the thirteenth. Some time during a practice called term pre-embryo is depleted from the fourteenth or fifteenth day onwards. The minority group of cells within the embryo begins to develop into a fetus becomes a human being. The study will begin to see the difference of each cell. And found a group of cells developed into a structure called the primitive streak, which is the first phase of the nerves and spinal cord. This was a major turning point in the development of the embryo. Because of this, no secession as detached anymore. Embryo fifteen days tops. Becomes one human (If not untimely before), not more than that, from this point, the embryo will develop rapidly in the creation of various tissues when entering Week 6 blastocyst embryo becomes a fetus, we begin to see something similar. limbs and other organs of the human ethical problems that arise because of stem cell research. Because if the researchers want to extract cells from human embryos, embryos are often used between 5-7 days after fertilization (called blastocyst), which has a mass of cells (inner cell mass), it will be a source of reference. stem cell researchers want And the effect of cell extraction is out. The embryo is destroyed to make growth possible because of the knowledge that I mentioned above. Terms of several countries, there tend to be performed on embryos carefully. (And with respect to a certain extent) by prohibiting the use of cells from embryos after 14 days after fertilization, the period after fertilization, the embryo will be available or not available. Although reference is made on the base of scientific knowledge about the development of the human embryo in the womb, as mentioned above. (Based on 14 criteria that embryos have no notions of what is close to the nervous system or the perception thereof), but it is also argued that much. From a human embryo at any clear answer on this matter would not be based on a scientific understanding alone. Not that the science is not clear enough. It is because human beings have an opinion on the interpretation of the word "life" varies.
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