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Evaluation of the effectiveness of selected natural fertility symptoms used for contraception: estimation of the Pearl index of
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![PDF] Evaluation of the effectiveness of selected natural fertility symptoms used for contraception: estimation of the Pearl index of Lady-Comp, Pearly and Daysy cycle computers based on 10 years of observation in PDF] Evaluation of the effectiveness of selected natural fertility symptoms used for contraception: estimation of the Pearl index of Lady-Comp, Pearly and Daysy cycle computers based on 10 years of observation in](https://d3i71xaburhd42.cloudfront.net/8dc9c558113046140483795a75ccaeaae2298496/3-Table2-1.png)