Endocrine Correlates of Reproduction in the Wolf. I. Serum Progesterone, Estradiol and LH during the Estrous Cycle1

Abstract

The estrous cycle of 10 intact female wolves, aged 8 months-8 years at the initiation of the study, was characterized in terms of vaginal smears, behavioral observations and serum concentrations of estradiol-17(3, progesterone and luteinizing hormone (LH) from January through June.