It has been suggested that sex differentiation in vertebrates is steroid hormone dependent,
that estrogens play a critical role in ovarian differentiation, and that male sex differentiation …

Estradiol-17β was measured in the plasma and urogenital tissues of male and female
alligator embryos. Hormone levels were generally very low and there was no significant …

Sexual differentiation of the gonads in Alligator mississippiensis and many other oviparous
reptiles is controlled by egg incubation temperature. Estrogens are thought to play a role in …

The sex of alligator embryos is determined by incubation temperature. Females are
produced at temperatures between 29° C and 31° C and males at 33° C. As part of an …

Abstract Treatment of developing embryos of two diverse species of reptiles with fadrozole
(a potent and specific nonsteroidal inhibitor of aromatase activity in mammals) resulted in …

Gonads, still in the indifferent stage, were taken from tadpoles of Xenopus laevis and
maintained in organ culture. These gonads were kept in good condition by frequent …

During embryogenesis, incubation temperature and the hormonal environment influence
gonadal differentiation of some reptiles, including all crocodilians. Current evidence …

In all species of crocodilians, sex is determined not by genetic mechanisms, but by the
temperature at which the egg is incubated. In the American alligator (Alligator …

The leading explanation of temperature-dependent sex determination (TSD) in reptiles
postulates that (1) ovarian differentiation is directed by estrogen and that (2) estrogen is …

Administration of exogenous estradiol between stages 50 and 52 completely feminized the
developing gonads of Xenopus laevis. However, when tadpoles were injected or cultured …