Pearl index


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Pearl index

(pĕrl),
the number of failures of a contraceptive method per 100 woman years of exposure.
Farlex Partner Medical Dictionary © Farlex 2012
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
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

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  
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

Pearl in·dex

(pĕrl in'deks)
The number of failures of a contraceptive method per 100 woman years of exposure.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Pearl,

Raymond, U.S. biologist, 1879-1940.
Pearl index - the number of failures of a contraceptive method per 100 woman years of exposure.
Medical Eponyms © Farlex 2012
References in periodicals archive ?
The implant has a length of 40mm and a diameter of 2mm and is provided in a disposable sterile inserter for sub dermal application contraceptive action is achieved mainly by inhibition of ovulation and lasts for 3 years (Makarainen et-al 1998) (2,3,4) Efficacy of this implant is excellent with pearl index of O.
The Pearl Index in the first year, among women who were 16-35 years old when they enrolled in the study, was 0.15.
It will assess the effectiveness of the patch in avoiding pregnancy using the Pearl Index as the primary contraceptive efficacy measure.
The clinical trial will assess the effectiveness of the patch in preventing pregnancy using the Pearl Index as the primary contraceptive efficacy measure.