This is a pretty broad question so let me explain:
I obviously know how human babies are made, sperm goes into the egg and develops into a baby. Sometimes more than one baby can come out of the egg splits after fertilization or if two seperate eggs are fertilized at the same time. How do other animals produce more than one baby (like cats, rodents, etc)? Is it the same process?
In: Biology
Same process. Usually what happens is the mother ovulates multiple eggs at a time. So if a cat has 6 kittens in a litter, it ovulated at least 6 eggs during her heat and 6 eggs got fertilized.
Nine-Banded armadillos are weird, they have identical quadruplets. So only one egg is ovulated, but it splits into four embryos, every time. I don’t know of any other animals where identical twins+ are the norm. (ignoring asexual reproduction)
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