How can a women lactate if she is not pregnant?

A woman can lactate without being pregnant due to various factors, such as hormonal imbalances, certain medical conditions, or stimulation of the nipples. Conditions like galactorrhea can cause milk production due to elevated levels of prolactin, a hormone responsible for milk synthesis. Additionally, some women may induce lactation through consistent breast stimulation or pumping, even if they haven't been pregnant.