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- W2362531818 abstract "To explore possible discrepancies between recall data as usual menstrual cycle and the date of LMP used for calculations of efficacy of emergency contraception and biochemical data. To further study the credibility of estimating the efficacy of emergency contraception. Methods: 100 women asking for emergency contraception were given self-administered questionnaire on how certain they were of the date of their last menstrual period, of the length of their menstrual cycle and of the timing of unprotected intercourse. In contrast, B ultrasound was applied to assess the corresponding menstrual period and the event of ovulation. Results: 51 women were certain of the date of the LMP; 9 women could not recall the timing of intercourse; 58. 16% had had intercourse more than once; 32 women had B ultrasound's diagnosis that was inconsistent with their cycle day; 2 pregnancy occurred, one of which took place at 0% probability of pregnant risk based on Wilcox's method. Conclusion: The method depending on recalling the date of LMP and the timing of intercourse for calculating the date of ovulation and estimating the efficacy of emergency contraception seems to be inaccurate for a significant minority of women. As a result, a better reasonable method should be taken into consideration." @default.
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- W2362531818 date "2004-01-01" @default.
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- W2362531818 title "Study on the credibility of estimating the efficacy of emergency contraception" @default.
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