only once
a billion
A female whale can have one at a time to prevent pain and drowning.
Useally one at a time.
They have one calf at a time.
Usually they have one baby at a time; twins are very rare.
Female mice will mostly have from 6-12 babies at a time. Some Female might have more or less than that. There really is no right answer to this.
Female coyote has five to six pups in a litter
It depends it can probably be 1-12 babies
Blue whales only give birth to one baby (calf) at a time.
Two
2 to 6 babies.
im pretty sure a bowhead whale can only have 1 baby at a time because i researched this whale in my 5th grade class......... but i dont know how many calfs it can have.......