How many babies can a spider give birth to?

Depending on species, at least 100 and usually many more, as many as 3000 or more in a single season. The larger Spiders have comparatively fewer eggs, and fewer survive to adulthood.

A female wolf spider will carry around her egg sac with 100 to 300 eggs, and the young will clamber over her to ride along when they hatch. But within a few days they are off on their own.