The Pearl Index also provides no information on factors other than accidental pregnancy which may influence effectiveness calculations, such as:

An accidental pregnancy.

Some have accidental pregnancies and do not believe in abortion.

This encounter results in an accidental pregnancy (despite his losing a testicle and Miranda having only one functioning ovary).

This leads to an accidental pregnancy and raises questions about their future.

That means that over a year's time, about 5 out of 100 women who use this method will have an accidental pregnancy.

Rather, it is a consequence of accidental pregnancy and a decision not to get married.

I asked, suddenly realizing that an accidental pregnancy might not be the worst disaster we could have.

These strict protocols will not completely eliminate the risk of accidental pregnancy.

(In Britain, women taking Accutane actually sign a written agreement they will abort accidental pregnancies while on the drug.)