system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does ovulation work in mammals that have multiple babies?
gpt
Some mammals are Polyovulatory, which means they release more than one ovum (egg) per cycle.  Human females usually only release one egg at a time but sometimes can release more. A single egg can even split into two, forming two separate but identical twins.  Human twins occur at about 3 in a 1000 births.  There are even identical triplets formed the same way.

Other mammals can release many more eggs per cycle.  A pig's litter size is usually around 10 or so.