1. Longitudinal fecal hormone analysis for monitoring reproductive activity in the female polar bear (Ursus maritimus) 
M.A. Stoops, K.M. MacKinnon, T.L. Roth 
Theriogenology 
Volume 78, Issue 9, Pages (December 2012)
DOI: /j.theriogenology
Copyright © 2012 Elsevier Inc. Terms and Conditions

2. Fig. 1
Mean ± SEM fecal (A) androgen (T) and (B) progesterone (PdG) metabolites in parturient (•) and nonparturient (o) polar bears aligned from date of mating. * Difference between groups (P < 0.05).
Theriogenology  , DOI: ( /j.theriogenology )
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3. Fig. 2
Fecal androgen (T, Δ) and progesterone (PdG, o) metabolites excretion profile for a polar bear that gave birth to two live female cubs. Solid arrows indicate observations of mating. Open triangle denotes presumed time of implantation and the closed triangle indicates parturition.
Theriogenology  , DOI: ( /j.theriogenology )
Copyright © 2012 Elsevier Inc. Terms and Conditions

4. Fig. 3
Mean ± SEM fecal (A) progesterone (P4, filled box), progesterone metabolite (PdG, empty box) and (B) androgen metabolite (T) concentrations excreted by polar bears aligned from date of parturition. Within a hormone, means without a common superscript letter differed (P < 0.05).
Theriogenology  , DOI: ( /j.theriogenology )
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5. Fig. 4
Fecal androgen (T, Δ) and progesterone (PdG, o) metabolite excretion profile for a pseudopregnant control bear. Breeding activity (double-headed solid arrow) was observed between the control and both a castrated male and female conspecific. Dashed arrow indicates sustained rise of PdG in the Fall.
Theriogenology  , DOI: ( /j.theriogenology )
Copyright © 2012 Elsevier Inc. Terms and Conditions