Psychology 2075 Chapter 7: Chapter 7 Notes .docx
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The combination pill: contains estrogen and progestin both at levels higher than natural levels for 21 days and no pill or placebo pill for 7 days, there have been variations to this which is seasonale: provides 84 days of combined hormones and 7 days of placebo: women only as her period 1 every 3 months, another is loestrin24 not available in canada 24 active pills, 4 inactive pills. In one year, the number of women who become pregnnany while using a contraceptive out of 1000 women is called the failure rate or pregnancy rate: effectiveness is 100 minus the failure rate, there is failure rate for the perfect user and for the typical user, perfect user: best possible use of the method, typical user: use the method imperfectly, how people actually use the method, combination pills are one of the most effective methods of birth control.