Reproductive Biology and Endocrinology

Table 2 Comparison of fecal hormone metabolites in female giant anteaters

From: Fecal estrogen, progestagen and glucocorticoid metabolites during the estrous cycle and pregnancy in the giant anteater (Myrmecophaga tridactyla): evidence for delayed implantation

	Animal ID
	Monita	Emelia	Lia	Praim
P4 metabolites
Basal	19.4 ± 1.8	15.5 ± 2.3	20.9 ± 1.3	ND
Luteal phase	136.8 ± 1.8	41.2 ± 5.1	57.5 ± 0.7	ND
Pregnancy, primary rise	ND	83.2 ± 4.3	62.2 ± 3.9	155.6 ± 16.6
Pregnancy, secondary rise	ND	540.6 ± 43.1	419.5 ± 61.1	467.0 ± 39.4
E1 metabolites
Basal	16.8 ± 1.1^a	32.6 ± 8.0^b	8.9 ± 1.4^c	ND
Peak estrus	96.3 ± 20.3	121.1 ± 43.3	27.7 ± 7.1	15.6 (1 peak)
Pregnancy	ND	103.8 ± 6.4^a	53.6 ± 5.1^b	53.8 ± 6.7^b
E2 metabolites
Basal	114.4 ± 3.7^a	104.9 ± 5.9^a	69.8 ± 7.5^b	ND
Peak estrus	298.3 ± 36.3	283.6 ± 100.7	177.0 ± 28.8	112.0 (1 peak)
Pregnancy	ND	204.5 ± 11.4^a	151.6 ± 11.3^b	210.5 ± 16.9^ab
GC metabolites
Estrous cycle	33.5 ± 0.9	ND	ND	ND
Pregnancy, primary rise	ND	52.7 ± 2.3^a	33.2 ± 2.4^b	36.8 ± 2.3^b
Pregnancy, secondary rise	ND	70.4 ± 3.1^a	90.0 ± 8.9^b	55.8 ± 2.5^a

Data are shown as the mean ± SEM (ng/g). Monita: adult, n = 6 estrous cycles, no pregnancy during the study period; Emelia and Lia, 1 pregnancy; Praim, n = 0 observed estrous cycles; 1 pregnancy. ND = not determined in this study. Different letters indicated significant differences (p < 0.05) between animals for the corresponding parameter.

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