| | Animal | Species | Average Life span (years) | Average size (cm) | Average weight (kg) | Menstrual length (days)* | Advantages/disadvantages |
| | Olive baboon | Papio anubis | 25–30 | M: 70
F: 60 | M: 24
F: 14.7 | 30–35 [23] | Advantages: anatomical and physiological closeness to humans, large size (facilitates procedures), straight cervix, readily available, non-threatened, can visually monitor cycle stage with greatest precision
Disadvantages: large size and strength, large housing requirements | | African Green Monkey (Vervet, Grivet) [24, 25] | Chlorocebus aethiops (formerly Cercopithecus aethiops) | 11–13 (captive) | M: 49
F: 42.6 | M: 5.5
F: 4.1 | 30–32 [26] | Advantages: anatomical and physiological closeness to humans, manageable size, readily available, non-threatened
Disadvantages: tortuous Cervix, cannot visually monitor cycle stage | | Common marmoset | Callithrix jacchus | 12 (wild) | M: 18.8
F: 18.5 | .350–.450* [27] | 22–28 | Advantages: anatomical and physiological closeness to humans, manageable size, readily available, non-threatened
Disadvantages: no menstruation (has estrus cycle) [4], small size (precludes certain procedures); ovulation pattern slightly different from humans (twinning is the normal state), cannot visually monitor cycle stage |
| | Macaques | | | | Pigtailed | Macaca nemestrina | 26 | M: 49.5–56.4
F: 46.7–56.4 | M: 6.2–14.5
F: 4.7–10.9 | 30–40 [28] | Advantages: anatomy of reproductive tract tissues and physiology of menstrual cycle similar to humans, size (facilitates most procedures), non-threatened, can visually monitor cycle stage to some degree
Disadvantages: limited availability, some species are seasonal breeders (rhesus, possibly Formosan rock macaque), tortuous cervix, aggressive temperament (rhesus), zoonotic disease risk | | Formosan rock macaque (Taiwan monkey) | Macaca cyclopis | NA | 40–55* | 4–8* | 24–31 | | Rhesus | Macaca mulatta | 25 | M: 53.2
F: 46.9 | M: 7.7
F: 5.34 | 28 | | Cynomolgus | Macaca fascicularis | 31 | M: 41–65
F: 39–50 | M: 4.7–8.3
F: 2.5–5.7 | 28–32 [29, 30] |
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