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. Author manuscript; available in PMC: 2020 Nov 1.
Published in final edited form as: J Autism Dev Disord. 2019 Nov;49(11):4572–4583. doi: 10.1007/s10803-019-04162-2

Figure 1.

Figure 1.

The placenta produces estradiol from DHEA of both maternal and fetal origin and shunts over 90% of estradiol into the maternal circulation. The volume of DHEA substrate determines placental estradiol production and subsequently maternal serum estradiol levels. DHEA exists primarily in its conjugated form DHEAS.