Which mammal has the shortest gestation period? Which one has the longest?

Gestation period: Gestation is the period of time between fertilization and birth of mammals—in other words, the time spent in the mother's uterus.

Opossom-12 days

Mouse- 21 days

Dog- 2 months

Lion- 4 months

Grizzly Bear- 7 months

Giraffe- 14 months

Orca Whale-12-16 months

Elephant- 22 months

The shortest known gestation period is 12 to 13 days. A marsupial, the American or Virginian opossum is known to have the shortest gestation period.

The longest gestation period for a mammal is that of the African elephant with an average of 20-22 months.

The human gestation period is 9 months. Leaving me due June 25th!