The goal of this article is to summarize what is known about the pathways of steroid hormone synthesis and metabolism in human pregnancy. Emphasis is placed on the distinctions between steroidogenic pathways in adults and those that are operative during human pregnancy.
Department of Obstetrics and Gynecology, Section of Reproductive Endocrinology and Infertility, Yale University School of Medicine, 333 Cedar Street, P.O. Box 208063, New Haven, CT 06520, USA. caleb.kallen@yale.edu
