10 Mamíferos que possuem os períodos de gestação mais curtos

10 Mammals that have the shortest gestation periods
Gestation is the period of time between fertilization and birth in oviparous animals.

The shortest gestation period known is 12 to 13 days, shared by three marsupials: the American or Virginian opossum (Didelphis marsupialis); the rare water opossum, or yapok (Chironectes minimus) of central and northern South America; and the eastern native cat (Dasyurus viverrinus) of Australia.

The young of each of these marsupials are born while still immature and complete their development in the ventral pouch of their mother.

While 12 to 13 days is the average, the gestation period is sometimes as short as eight days.

1. Opossum (Didelphis virginiana)

Gestation period in days: 12–13

2. Hamster

Gestation period in days: 16-23

3. Mouse (domestic white)

Gestation period in days: 19

4. Mouse (meadow)

Gestation period in days: 21

5. Rat (Rattus norvegicus)

Gestation period in days: 21-23

6. Gerbil

Gestation period in days: 22-26

7. Wombat

Gestation period in days: 26–28

8. Muskrat

Gestation period in days: 28–30

9. Rabbit (domestic)

Gestation period in days: 28–35, Average 31-32

10. Squirrel (gray)

Gestation period in days: 30–40

Source: http://en.wikipedia.org/wiki/Gestation_period

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