Answers are grounded in this paper and cite their sources.
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.
No takes yet. Share an insight, caveat, or question.
Beastall et al. (1976) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: