I was lactating last year..
I wanted to experience breast feeding, so with help from a doctor,, we made it possible.
My doctor changed my hormone medication doses, which as she said mimicked pregnancy, actually tricked my body in thinking it was pregnant. I also took some herbal tablets to help with the milk production. (You still cant pass a pregnancy test, i tried.. apparently those tests look for a hormone, which only comes from a fetus).
I must say it was a wild ride, i was very sensitive and had mood swings...I even had some morning sickness in the beginning. I was actually asked by a someone I know, i am sure i am not pregnant (She does not know that I am trans). only people close to me know my secret. My breasts become fuller, as the my milk tracts matured.
Yes, started to produce milk.. I actually got a breast pump, and would extract milk.. I did not produce as much milk as a mother would. When I started pumping, very little came out, but as time went on.. flowed nicely.. I enjoyed the feeling of the breast pump, pumping. It creates a seal on the nipple and feels nice as it extracts the milk. I would pump about 15minutes a time... I had a double pump, so i could do both breasts at once.
After a few months of lactating i took a tablet to dry up the milk.. My breasts are fuller now and that seems permanent and my hormones medication was returned to the old dosage.