Gamissans O, Wilson G R, Cuyas J, Davi E, Pujol-Amat P
Obstet Gynecol. 1977 Oct;50(4):439-41.
To study the biogenesis of estrogens by the fetoplacental unit in late pregnancy, dehydroepiandrosterone sulfate was injected directly into the fetus and maternal blood sampled at intervals for 2 hours thereafter. There was no increase of estrone, estradiol, or estriol concentration in the maternal circulation.