African Elephant: The African elephant holds the record for the longest pregnancy period among land animals, lasting approximately 22 months.
Bottlenose Dolphin: Bottlenose dolphins have a pregnancy period of around 12 months. However, in some cases, it can extend up to 14 months.
Orca (Killer Whale): Female orcas have a gestation period of approximately 17 to 18 months, making it one of the longest among marine mammals.
Giraffe: Giraffes have a pregnancy period of about 14 to 15 months. This extended period is believed to be necessary for the development of the calf, considering its large size at birth.
Blue Whale: Blue whales, the largest animals on Earth, have a gestation period of around 10 to 12 months.
Sperm Whale: Sperm whales have a relatively long pregnancy period that typically lasts for about 14 to 16 months.
Frilled Shark: Frilled sharks, deep-sea dwellers, have one of the longest known gestation periods, lasting approximately 3.5 years.
Indian Rhinoceros: Indian rhinoceroses have a pregnancy period of about 15 to 16 months.
Walrus: Walruses have a gestation period of approximately 15 to 16 months.
Leatherback Sea Turtle: Leatherback sea turtles have a relatively long incubation period, lasting around 60 to 70 days, before the hatchlings emerge from their nests.