Sperm cells were first obtained from the bone marrow

Immature sperm cells managed to get a German scientist.
Experts warn: hope for a speedy treatment of male infertility is not worth it.
While it is not necessary to hope for a speedy treatment of male infertility, experts warn
If they can improve - and this, researchers hope, they will be able to do over the next five years - that these cells can be used for the treatment of infertility.
Experts, however, warn that draw far-reaching conclusions too early. And it is not only in science: in some countries, including the UK, are now offered to the consideration of new laws that may prohibit the use of artificial eggs or sperm in solving the problems of human reproduction.