Placenta is an organ which raises a fertilized ovum into a baby. It comes simultaneously out of the body when a child is born. Placenta abundantly contains "growth factor" which promotes cell division and activates a cell, and for many years the extract has been used for antiaging and cosmetics.
It is also known for the improvement effect of liver function or menopausal disorders, and has also become materials of medical supplies. Cosmetically it is used to approach antiaging, such as whitening and face lift. It is also accepted by the Ministry of Health, Labor and Welfare as a whitening active ingredient.
Now, there are human, pig, and horse placentas in the market. A pig is closer to a human being, even more than an anthropoid with weight, internal organs, and the skin. Even at the medical field, organ donation from a pig to a human is performed.