Each female bed bug is capable of laying as many as four hundred eggs.  This allows for geometric growth of the bed bug population in very little time.  Starting with a single impregnated female, for example, a room may have four hundred bugs in ten days.  Once these mature, if each of the hatched eggs in turn reproduces, and assuming a male to female ration of 50/50, there will be 80,000 bed bugs in the room.  The next successive generation of bed bugs could potentially boost this number to sixteen million.

One can see from these figures why it is so difficult to completely wipe out a bed bug infestation.  No matter how successful elimination techniques are, if merely a single adult female bed bug manages to survive them, then there can soon be a full-blown infestation with millions of bugs present once again.