Reply #71: That table suggests that it's dosing failures that lead to pill failures.

[Tesha]

> Implant (Norplant) 0.09% 0.09%
> Hormone Shot (Depo-Provera) 0.3% 0.3%
> Combined Pill (Estrogen/Progestin) 5% 0.1%
> Minipill (Progestin only) 5% 0.5%

The first number is the "Typical Use" rate, meaning that the method
either was not always used correctly or was not used with every act
of sexual intercourse (e.g., sometimes forgot to take a birth control
pill as directed and became pregnant), or was used correctly but
failed anyway.

The second number is the "Lowest Expected" rate, meaning that the
method was always used correctly with every act of sexual intercourse
but failed anyway (e.g., always took a birth control pill as directed
but still became pregnant).

The pill, when actually taken according to directions, is far more
effective than 95%; the minipill is 99.5% effective and the combined
hormone pill is 99.9% effective, so if they can follow directions,
only *ONE* of your hypothetical students need get pregnant *EVERY
TWO TO TEN YEARS*.

Tesha