a subversion of the international news of the traditional concept of human reproduction --- Laboratory, today announced the United Kingdom: the first use of embryonic stem cells produced in vitro in human sperm, which means that sperm may no longer need to manufacture in the male body. However, this cell material can actually be called the true sense of the qualified sperm occur at home and abroad questioned the scientific community voice, Shanghai University of the basic institutions of experts to determine the "artificial sperm does not seem like God."

This time, the University of Newcastle staff and other research institutions to the male with XY chromosomes of embryonic stem cells to "seed", a modulation of chemical substances and the vitamins consisting of" nutrition "to stem cell differentiation, the formation of sperm instead. Under a microscope, this man-made similar to the sperm and human sperm, there are the end of the first, you can swim.

more as a result of embryonic stem cells exist in the fetus, if the technology can achieve, you can extract the stem cells of fetal abdomen, it did not produce it before the birth of the sperm. In addition, due to the human skin stem cells to reverse to restore the state of scientific experiments have had some success, in theory, can also be made use of stem cells, skin cells, sperm and recycling.

public than the issue of artificial sperm ethical challenge, scientists issued more technical challenge. Shanghai Fudan University School of Medicine Head of the Department of Anatomy and Histology and Embryology Professor Zhou Guomin believe that the development of stem cells in vitro with a wide range of possibilities, could lead to changes in cell morphology, may also lead to changes in cell function. He said that the sperm in the testis and epididymis in the process of going through the development of very complex, requiring multi-factor regulation in vivo, deletion of any element may result in immature sperm. "This may just be the shape of the sperm of man-made, rather than spirit likeness, may not have the genetic function, or loss of certain functions."

3 years ago, the British research team have been key members of the public to use similar methods mice to produce artificial sperm and eggs into the mother mouse, and finally to generate the surrogate female embryo implanted in the body. During this period, about 400 of their only infertile eggs of seven baby mice. In which a young died soon after birth, and the remaining six months later in five killed, and the average life span of normal mice is about 2 years. In view of this, can help the sperm for artificial human reproduction, or will be able to ensure that future generations of health, is still a big question mark. But experts also said that the study to further understand the mechanism of sperm development, to explain the causes of such immature sperm are still meaningful.