Pearl Index
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Pearl Index

A formula that allows comparison of the efficacy of contraceptive methods, calculated as the pregnancy rate in population divided by 100 years of user exposure

Pearl Index

Obstetrics A formula that allows comparison of the efficacy of contraceptive methods, calculated as the pregnancy rate in population divided by 100 yrs of exposure. See Breast feeding, Coitus interruptus, Condoms, Morning-after pill, Contraception, Natural family planning, Norplant, Rhythm method, RU 486.

Pearl index–pregnancies/100 years of use

Physiologic 15-30/100 years: Coitus interruptus, natural family planning (rhythm or safe period), eg calendar method, evaluation of cervical mucosa or temperature, breast feeding

Chemical 15-20/100 years: Contraceptive sponges

Barrier 2-20/100 years: Intrauterine devices, condoms

Hormonal 1-3/100 years

Surgical << 1/100 years: Ligation of fallopian tubes, vas deferens

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Pearl Index (redirected from Pearl index-)

Pearl Index
(redirected from Pearl index-)