The eggs of the bed bug are much smaller than the adult insects, just as one might expect. However, while the bed bugs themselves tend to be shaped like an oval, their eggs are not properly ovoid but are instead shaped rather like a pear. In size, these eggs are no larger than the head of a pin. This tiny size means that many clutches of eggs appear in groups of ten or larger, with the upper range of egg groupings tending to be about fifty eggs at a time. All of these eggs can easily fit together into a single crevice or crack. These eggs will hatch out in only ten days or so, meaning that an infestation will quickly recur if eradication methods target only the living bed bugs but not their eggs.