Update on therapy for precocious puberty. Background An increase in the number of captive assurance colonies for amphibians has occurred in the last several decades as a conservation measure to combat the drastic global decline and extinction of many species [ 1 — 3 ]. Weight measurements were averaged for each individual during the study period.
Panel a depicts a trans-abdominal ultrasound scan of a male, while Panels b and c show female scans with low and high follicular development, respectively.
Braunstein GD. Am Fam Physician. Normal puberty begins between eight and 14 years of age in girls and between nine and 14 years of age in boys. However, this is not always easily accomplished, particularly when working with species that have monomorphic or weakly dimorphic secondary sexual characteristics.
Puberty in Boys By Irvin H. Modern Trends in Endocrinology. Endocrinology of the Testis and Male Reproduction. Horm Mol Biol Clin Investig. Having a low level of progesterone can lead to irregular periodsdifficulty conceiving, and a higher risk of complications during pregnancy.
Axillary hair Open in a separate window. Use of this ratio showed greater accuracy in predicting the sex of the animal compared to using testosterone or estrone concentrations alone.