As far as I am aware the surgery is improving but this is dollar driven. The idea of using stem cells to make organs is in progress but very early. The idea of making testes or ovaries may sound far fetched and I disputed it on another post, the argument being priority. I argued that it would not be a high priority for male (or female) sex organs to be derived but rather hearts, livers, pancreas and kidneys( And of course neural tissue.) would be the priority. Having said that I then found that the USA military is spending considerable amounts on such research, because of war fare castrated male soldiers and female soldiers with breast cancer and ovarian cancer etc. I am personally not aware of anything specific, but the USA military usually gets what it wants.
I would suggest don't watch this space but who knows?
As a joke I'm not sure how it would work in real life. " Village People Song" In the Navy they give you new balls, in the Navy you get a big tool, in the Navy you can have breast implants Blah de blah.
Cindy