Hill, N C The placental transfer of mifepristone (RU 486) during the second trimester and its influence upon maternal and fetal steroid concentrations. [electronic resource] - British journal of obstetrics and gynaecology May 1990 - 406-11 p. digital Publication Type: Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't ISSN: 0306-5456 Standard No.: 10.1111/j.1471-0528.1990.tb01827.x doi Subjects--Topical Terms: Aldosterone--bloodCortisone--bloodDouble-Blind MethodEstradiol--bloodFemaleFetal Blood--analysisHumansMaternal-Fetal ExchangeMifepristone--administration & dosagePregnancyPregnancy Trimester, SecondProgesterone--bloodRandom AllocationSteroids--blood