i do not understand your question well. is it doing this?:
Hormonal therapy to induce lactation generally consists of administration of estrogen to simulate the high-estrogen state of pregnancy. The estrogen is then abruptly withdrawn to mimic the rapid hormonal changes following delivery. A course of a prolactin-enhancing drug such as metaclopromide (Reglan.) is then instituted. Sucking stimulation (with a pump or by baby) is begun at this point.
here is a site that talks about it, doesn't sound good to me: