Can women make sperm?

UPDATE: All my speculations are likely to be not possible. There are parts of the Y chromosome essential for spermatogenesis. So what I speculate is fiction.

Men are obsolete. They are not needed anymore to sustain life on this planet. Sounds science fiction?

No, I am not talking about cloning, and making exact replicas. I am talking about women making sperms with an X chromosomes so they could reproduce and make more females. The sperm could be from one woman and the egg from a different one.

We are not there yet but the BBC has this story:

''Scientists say they have successfully made immature sperm cells from human bone marrow samples.''

''If these can be grown into fully developed sperm, which the researchers hope to do within five years, they may be useful in fertility treatments.''

...

''The researchers from the Universities of Göttingen and Münster and the Medical School of Hannover isolated adult stem cells - cells that have the ability to become many types of tissue in the body - from bone marrow samples taken from male volunteers.''

They took the bone marrow samples from male volunteers. I wonder was the decision because only male stem cells can differentiate to spermatogonia (if spermatogenesis is entirely or partly coded on the Y chromosome) or it was a political move. Taking samples from males and ''females'' may extend the ban from the use of artificial sperm in reproduction clinics (technically no one is there yet), on to this line of research completely. Despite its importance for many people:

So not to sound sensationalist and an alarmist. This is still very early and there is no proof that mature sperms (if produced) are of good enough quality and biologically stable.