The conversion of [1, 2, 6, 7-3H]-testosterone to radioactive estradiol was assessed in tissue
slices of 18 different tissues from rabbit embryos that varied in age from 16 to 29 days�…

The conversion of radiolabeled androgen to estrone and 17β-estradiol was assessed in
tissues of human embryos that varied from phenotypically indifferent stages (1–3 cm�…

Testes from rat embryos of 13�-21� days of age were incubated with 7-3H-progesterone.
The radioactive testosterone and androstenedione produced were estimated using the�…

Bisected fetal guinea pig ovaries and testes were examined in vitro for their ability to
synthesize androgens from [1-14C] sodium acetate and estrogens from either [1-3H]�…

Two aspects of testosterone formation by the fetal testes have been investigated in rabbit
embryos and newborn that varied in age from 17 days of gestation to 3 days after birth. In the�…

Testes of fetal rats possess the enzymes necessary for converting radioactive acetate to
radioactive testosterone as early as 15.5 days of intrauterine life. The fetal testis is, therefore�…

The steroidogenic potential of hamster tissues, just prior to implantation of the blastocyst in
the uterus, was characterized by incubating blastocysts (14) and pieces of endometrium with�…

Aromatase activity in fetal rat testes and ovaries was demonstrated by the conversion of
tritiated testosterone or 19-hydroxyandrostenedione into estrone and estradiol, which were�…

The rate of synthesis of estradiol-17β by the ovary, and of testosterone by the testis of the
newborn rat have been studied in vitro using tissue homogenates. Quantitative estimation of�…

Female gonads of fetal (on days 14.5, 16.5, 18.5 and 20.5 postcoitum) and neonatal rats (on
days 4.5 and 8.5 postpartum) were cultured in Medium 199 in the presence of [3 H]�…