The nurse knows that for a client who still has her ovaries intact, estrogen must be paired with what other drug when used to treat menopausal symptoms

The answer is Progestins. Some of numerous artificial progestational constituents that mimic some or all of the engagements of progesterone which is used as contraceptives one or the other single-handedly or in group with estrogen and with estrogen in hormone added therapy and in addition, it is female hormone like progesterone that turns on the inner lining of the uterus.