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Advances in Contraception

, Volume 12, Issue 2, pp 123–128 | Cite as

Calendar rhythm efficacy: a review

  • R. T. Kambic
  • V. Lamprecht
Review Article

Abstract

Objective: To estimate the unplanned pregnancy rate of calendar rhythm.

Design: Meta-analysis of eight studies of calendar rhythm published between 1940 and 1989.

Results: There exist few studies of the calendar rhythm method. Analysis of the best of these studies resulted in a conservative estimated Pearl rate of 18.5±1.8, and a less conservative estimate of 15.0±4.0, standardized to 12 months' observation; these results are in the range of other natural and barrier methods.

Discussion: We need properly done clinical trials of the calendar rhythm method to scientifically establish its effectiveness.

Keywords

Public Health Clinical Trial Pregnancy Rate Conservative Estimate Unplanned Pregnancy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Resumé

Objectif: Estimer le taux de grossesses non planifiées suite à l'application de la méthode des rythmes.

Protocole: Analyse d'ensemble de huit études sur la méthode des rythmes publiées entre 1940 et 1989.

Mesure prise en compte: Indice de Pearl estimé par régression linéaire à partir des données publiées.

Résultats: La méthode des rythmes n'a fait l'objet que de rares études. L'analyse des meilleures de ces études fait ressortir l'estimation prudente d'un indice de Pearl de 18,5±1.8, et l'estimation moins prudente de 15,0±4,0, standardisé pour 12 mois d'observation. Ces résultats entrent dans la gamme relevée pour d'autres méthodes naturelles et obstructives.

Discussion:Il est nécessaire de procéder à des essais cliniques bien conduits de la méthode des rythmes pour en établir scientifiquement l'efficacité.

Resumen

Objetivo: Estimar la tasa de embarazos no planificados con el método del ritmo.

Diseño: Meta-análisis de ocho estudios del método del ritmo publicados entre 1940 y 1989.

Medición del resultado: Tasa Pearl estimada por regresión lineal utilizando datos publicados.

Resultados: Hay pocos estudios del método del ritmo. El análisis de los mejores de estos estudios dio como resultado una tasa Pearl estimada moderada de 18,5±1,8, y una estimación menos moderada de 15,0 ±4,0, estandarizada a 12 meses de observaciones: estos resultados están en la gama de otros métodos naturales y de barrera.

Discusión: Es necesario tener ensayos clínicos debidamente realizados con el método del ritmo para determinar científicamente su eficacia.

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • R. T. Kambic
    • 1
  • V. Lamprecht
    • 2
  1. 1.Department of Population DynamicsThe Johns Hopkins School of Hygiene and Public HealthBaltimoreUSA
  2. 2.Institute for Reproductive HealthGeorgetown UniversityWashington DCUSA

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