Even with typical use though, HBC has a lower failure rate than "perfect" withdrawal use.
This may actually depend on the sources you use for the stats. According to Planned Parenthood (http://www.plannedparenthood.org/health-topics/birth-control/birth-control-pill-4228.htm#effective), HBC pills are about 92% effective with typical use; withdrawal's perfect use rate is 96% (http://www.plannedparenthood.org/health-topics/birth-control/withdrawal-pull-out-method-4218.htm#effective). This table (http://www.contraceptivetechnology.org/table.html) from Contraceptive Technology offers the same statistics.
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Date: 2009-04-26 12:15 am (UTC)This may actually depend on the sources you use for the stats. According to Planned Parenthood (http://www.plannedparenthood.org/health-topics/birth-control/birth-control-pill-4228.htm#effective), HBC pills are about 92% effective with typical use; withdrawal's perfect use rate is 96% (http://www.plannedparenthood.org/health-topics/birth-control/withdrawal-pull-out-method-4218.htm#effective). This table (http://www.contraceptivetechnology.org/table.html) from Contraceptive Technology offers the same statistics.