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Table 1 Reproductive characteristics of 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 name Studbook number Age range (years) Estrous cycles (count) Estrous cycle (days) Luteal phase (days) Pregnancy (days) Post-partum return to estrous (days)
Monita 314 6.2 – 7.8 6 62.5 ± 2.6 (55 – 74) 24.8 ±1.3 (22 – 33)   
Emelia 374 3.6 – 5.6 3 47.3 ± 4.3 (42 – 56) 25.2 ± 0.7 (23 – 27) 183 151
Lia 376 3.5 – 5.6 3 49.3 ± 2.8 (46 – 55) 20.1 ± 0.4 (19 – 22) 171 60
Odelia 379 3.5 – 3.7 0   16, 16   
Gabriella 395 1.3 – 2.9 0     
Praim 411 1.5 – 2.6 0   16, 28 175 88
Maripi 402 0.9 – 1.4 0     
  1. Data are shown as the mean ± SEM (range). Age range was estimated from beginning to end of the fecal collection period. Although two luteal phases were observed for Odelia and Praim, the lack of definitive E peaks did not allow for an estimation of total estrous cycle length. Gabriella and Maripi did not exhibit luteal activity during the study period.