Beastall G H, Kelly A M, England P, Rao L G, MacGregor M W, Paterson M L
Scott Med J. 1976 Jul;21(3):106-8. doi: 10.1177/003693307602100303.
As a result of routine screening of ante-natal patients by urinary total oestrogens and plasma human placental lactogen (HPL) from 35 weeks, a rare placental sulphatase deficiency was indicated which was later confirmed by in vitro studies of placental enzyme activities.