Cyclic excretion of urinary oestrogens in female tamarins (Saguinus oedipus)

Publisher Website
Google Scholar
Abstract
Urine was collected from 6 female cotton-top tamarins [S. o. oedipus] and urinary estrone and estradiol concentrations were measured by radioimmunoassay. Estrone was excreted at 50-fold higher concentrations than estradiol. Five females showed patterns of regular estrone cyclicity, with a mean peak-to-peak estrone cycle of 23.6 .+-. 1.2 days. Levels of estradiol tended to vary with levels of estrone excretion, but peaks were less pronounced and more variable. The 6th female, diagnosed as having wasting marmoset syndrome, had very low levels of excreted estrogens, suggesting infertility. Estrone could provide a good index to ovarian cyclicity in female cotton-top tamarins.