1 The Depo-ProveraÂ® shot is very effective in preventing pregnancy. 2  It is important to get your shot every 13 weeks (3 months).  Periods can be heavier initially, and then lighter, or absent while on Depo-ProveraÂ®.
there are three animals close to being extinct wich are the polar bears, tigers and dolphins but dolphins are probably the closest one to becoming extinct. hope we ansered you â¦ r question. Jake Wayne
Permian extinction (about 266 million to 252 million years ago), the most dramatic die-off, eliminating about half of all families, some 95 percent of marine species (nearly wiping out brachiopods and corals), and about 70 percent of land species (including plants, insects, and vertebrates).