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A spider lay dozen of eggs.
The number of eggs laid during a spider's lifetime varies according to the species. Some larger spiders lay more than two thousand eggs, but many tiny spiders lay as few as one or two, or as many as a dozen eggs. Spiders of average size probably lay around one hundred eggs. Most spiders lay all their eggs at one time and enclose them in a single egg sac; others lay a series of eggs over a period of time and enclose them in multiple egg sacs.
Source: Headstrom, Richard. Spiders of the United States, p. 34.
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