There is normally not a fixed number, but my research suggests that it increases by 6-8% per year.
All whales give birth in nearly nine to ten months.
Blue whales only give birth to one baby (calf) at a time.
Whales do not lay eggs, they give birth to live young.
Whales are mammals, sharks are fish. Therefore, whales are air-breathing creatures while sharks breathe via gills. Whales give birth to live young; many sharks also give birth to live young, but some species lay eggs. Sharks have very tiny scales (unlike other fish which have scales big enough to easily see, while whales have skin. Many species of shark tend to be predatory, although there are always exceptions, such as the harmless whale shark. Similarly, while many species of whale do not hunt other sea creatures, the orca, or killer whale, is an exception to this.
They lay eggs, rather than have live young
Humpback whales typically give birth to a single calf every two to three years. The gestation period for humpback whales is about 11 to 12 months. In rare cases, twins can occur, but this is extremely uncommon. After birth, the calf is nursed for about six months before it begins to eat solid food.
Just one.
Blue whales give birth to one calf, every two to three years.
Ostriches don't give live birth. They're birds, they lay eggs.
Boas generally have between 30 and 40 living young but can have as many as 60.
Yes, ferrets give birth to live young known as kits. A ferret litter can be as few as 1 kit or as many as 17 kits.
BLUE WHALES are MAMMALS. They don't lay eggs. They give birth to a live baby.