He argued that its failure rate was too high : to promote it for contraception , despite the availability of other effective contraceptive methods , would result in many abortions from unwanted pregnancies .
Ogino opposed the use of his method for contraception .
Ogino argued that its failure rate was too high : to promote it for contraception , despite the availability of other effective contraceptive methods , would result in many abortions from unwanted pregnancies .
Ogino opposed the use of his method for contraception .