For those pointing out that this goes against God's will. I do have a genuine query on that as if that line of "logic" works then...
Treating illness with medication is against God's will. God created the likes of Ebola for whatever reason best known to it, we'll throw a bone and say population control. You then trying to come up with artificial means to support your immune system goes against God's plan. It gave you the immune system you have, it created the virus which infects you. If it's will is that only 12% of people recover from the disease naturally as an example. if you are among the 88% who cannot fight it off without medication to artificially destroy the virus, you have surely interfered with it's plan?
Same can be said for any medical procedure really where the cause of the damage is natural occurrence (and not say stabbing yourself). Cancer for example, for whatever reason, God made it so that unlike the Naked Mole Rat, we do not possess the genes required to prevent cancer nor the superior ribosomes which are able to create almost 100% error-free proteins, cancer is in fact rather common among our species. This must surely have been a plan since God created both species, so cancer research such as the new breakthrough treatment of taking immune cells out of our body, genetically modifying them to be able to fight blood cancer, and cycling them back into the blood, is just as sinful (or what ever word one uses to go against God's wishes) as giving someone a uterus who would not normally have one. The same would be true if we tried to use research from the Naked Mole Rat to apply to us, as is also being done in with things like Zebra fish and Axolotl's with ability to re-grow organs/limbs.
Furthermore with the idea posted earlier that God "knit's us" a certain way and changing gender goes against this. Would this not be the same when a child is born with a congenital illness? For example a child born with Spina Bifida has, for whatever reason God wills it, been designed to have it's spinal cord exposed and not surrounded by bone/membrane. When we attempt to treat it (to a degree, since the "damage" cannot be cured) by putting in a shunt to help drain the excess cerebrospinal fluid, we are directly interfering with God's plan for this individual, which presumably is death, although you might question why that short life was God's plan, who are we to understand the machinations of a God.
Unless of course improving on God's design is okay sometimes, but not others, in which case I'd be interested to read the medical texts this deity has produced to explain approved and disapproved procedures.
As for the topic at hand. My main query on this would how can it work? There is more to growing a child within your body than the vessel that is the uterus, you have complex hormone changes at different stages of pregnancy which would need to be got just right and I'd have thought other physiological changes occur which could not be replicated in a male body, even if that male had been taking hormones to give them some feminine traits.