are you my mother?

Question: Which Mammal Has The Shortest Gestation Period? Which One Has The Longest?

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

The shortest known gestation period is 12 to 13 days. This record is shared by three marsupials (mammals in which the young are born prematurely and finish developing in a pouch located near the mother's abdomen): 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 longest gestation period for a mammal is that of the African elephant (Loxodonta africana) with an average of 660 days, and a maximum of 760 days.