A group of 50 postpartum [female][female] were treated with stilbestrol in an attempt to suppress lactation. Five mg. of stilbestrol were administered once, twice or three times. Breast engorgement was relieved or inhibited within 16 hrs. in 30 of 40 patients in the early puerperium. Treatment after the 2d wk. of puerperium, after lactation was well established, did not prove satisfactory.