Changes in serum progesterone, estradiol-17 beta , luteinizing hormone and prolactin in lactating and non-lactating Japanese black bears (Ursus thibetanus japonicus)
Sato, M.; Nakano, N.; Tsubota, T.; Komatsu, T.; Murase, T.; Kita, I.; Kudo, T.
Journal of Reproduction and Development 46(5): 301-308
ISSN/ISBN: 0916-8818 DOI: 10.1262/jrd.46.301
The concentrations of progesterone (P4), estradiol-17 beta (E2), luteinizing hormone (LH) and prolactin (PRL) in serum obtained from 9 captive female Japanese black bears, Ursus thibetanus japonicus, (7 lactating and 2 non-lactating) were obtained by a heterologous radioimmunoassay to clarify hormonal profiles during the pre- and post-parturition and lactation periods.