*Even when a woman who did not give birth to the child takes the hormones, I wouldn't be impressed. However, I think once lactation has been stimulated in a woman, it continues as long as the child feeds.
I think adopting women do this at times.*
Many women on the surrogacy groups I'm on have or plan to do induced lactation to try to feed their babies born through surrogacy
One woman bf successfully via induced lactation for 18 months!
My womb is now too damaged to support a pregnancy, so the only way we can turn one of our frozen embryos into a person is if we transfer one into someone else's womb. If we are ever lucky enough to have a child then I the intended (genetic but not birth) mother would ideally plan to at least attempt induced lactation, as a means not just of trying to feed my baby but a very valuable way for mothers who didn't carry or give birth to their children to bond with their baby. It's an enormously difficult thing to be unable to carry your own baby, so the ability to be able to feed your child yourself can be a huge thing emotionally for an intended mother.
"Mothers who induce lactation produce mature breastmilk that is comparable to the breastmilk of a biological mother at 10 days post partum. Because inducing moms are unable to produce human placental lactogen, they are unable to produce colostrum. However, since the amount of antibodies and other immune factors remains the same throughout lactation regardless of the volume of milk produced, mature milk contains ample amounts of antibodies, immune factors and other beneficial components that benefit both mother and baby."
https://www.asklenore.info/breastfeeding/inducedlactation/gnn_protocols.shtml