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Table 3 Reproductive characteristics of giant anteaters ( M. tridactyla ) and tamandua ( T. tetradactyla )

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

Species Age range (years) Estrous cycles (count) Estrous cycles (days) Luteal phase (days) Pregnancy (days) Post-partum return to estrus (days) Citation
M. tridactyla 0.5 – 7.8 12 55.4 ± 2.7 (42–74) 24.1 ± 1.1 (19 – 35) 176.0 ± 3.5 (171 – 183) 99.7 ± 26.9 (60 – 151) This studya
M. tridactyla < 2 – 13 10 51.4 ± 5.6 (44 – 63) 14 - 21 184 46.0 ±12.0 (28 – 70) Patzl et al. 1998 [10]a
T. tetradactyla 3 6 44.3 ± 4.5 (39 – 50) na 165 22 Kusuda et al. 2011 [27]b
T. tetradactyla na 11 42.0 ± 3.0 (38 – 46) 21.3 ± 0.4 na na Hay et al. 1994 [19]c
  1. Data are shown as the mean ± SEM (range) of all animals examined in each study. na = data not reported in the cited manuscript. aEIA performed on fecal extractions; bEIA performed on serum samples; cEIA performed on urine samples.