
Human cloning today is possible. Animals including a sheep and a dog have been cloned. I believe the way you do it is to take a cell (a skin cell for example. Or do only stem cells work?) and inject it into an egg within a female. Unlike sperm, it creates an exact duplicate. I don't know the specifics. But that would mean a woman could give birth to herself.
I don't want to get into the subject of the difference between a ghola and a clone so let's just call it duplicates.
Now this means that Dune's axlotl tanks are not necissary to create duplicates. You do not need to turn a woman brain dead and inflate her body up and attach tubes to her to turn her into a factory to create a duplicate of anyone. Of course we did not know how to create clones back in the 1980's when the last of Franks Dune books were published. But there is still other reasons for axlotl tanks. With axlotl tanks the Tlielaxu can refine their duplicates. Make them more docile, give them certain skills. In other words, they have complete control over how they want the duplicate to be like.
Human cloning has not taken place yet but it's noly a matter of time since we now have the basic knowledge. If I am ever cloned in the future, I'll be proud to know now that I am the original.