If a product contains bleach (peroxide), it will whiten your teeth. But not all treatments are created equal. It's the concentration or percent of hydrogen peroxide a teeth-whitening system contains and the amount of time it's in contact with your teeth that determines its effectiveness.
Definition of fecund - producing or capable of producing an abundance of offspring or new growth; highly fertile Definition of fecund - producing or capable of producing an abundance of offspring or new growth; highly fertile
fecund emphasizes abundance or rapidity in bearing fruit or offspring. a fecund herd fruitful adds to fertile and fecund the implication of desirable or useful results. fruitful research prolific stresses rapidity of spreading or multiplying by or as if by natural reproduction.