Sexual functionality (again)

Could it be possible to give doses of prolactin to new mothers having difficulty lactating? I am more often hearing of women having trouble in this area, and I am wondering what is the cause of it might be. It wouldn't be that hard to derive prolactin from nature, and it couldn't be that hard to disperse it in a simple way. If it could help (if it addresses the main problem) there would be a huge market for the product.

Did you know that the sexual fluid of the vagina actually has spermicidal qualities? It has a raised acidity level, which kills sperm which doesn't get to uterus which is slightly kinder.

Organ transplant

I wonder if it is possible to transplant female reproductive organs into a trans-sexual male? Or visa-versa? Could the sensitive skins of the original sex organs be kept, while the actual functioning reproductive organs be transplanted from a willing donor or deceased person? Transplanted is not the right word, as the organ is not being replaced with the same organ. However, if it could successfully be done, they could function reproductively as the new sex, so they could fully express the "woman" or "man" in their sexual functions and relationships. The once male could be a woman, mate, menstruate, and give birth naturally.

I have just been told by a trans-sexual that the donated organ would atrophy because the body of the recipient hasn't got the appropriate nerves to communicate what to do to the organ. So. due to lack of activity it would atrophy and basically rot.