However, milk production can be "artificially" and intentionally induced in the absence of any pregnancy in the woman. This is called induced lactation, while a woman who has lactated before and restarts is said to relactate. This can be done by regularly sucking on the nipples (several times a day), massaging and squeezing the female breasts, or with additional help from temporary use of milk-inducing drugs, such as the dopamine antagonist Domperidone. In principle—with considerable patience and perseverance—it is possible to induce lactation by sucking on the nipples alone.