Randomized comparison of two Internet-supported fertility-awareness-based methods of family planning

Richard J FehringJessica Pruszynski


The aim was to compare the efficacy and acceptability of two Internet-supported fertility-awareness-based methods of family planning. Six hundred and sixty-seven women and their male partners were randomized into either an electronic hormonal fertility monitor (EHFM) group or a cervical mucus monitoring (CMM) group. Both groups utilized a Web site with instructions, charts and support. Acceptability was assessed online at 1, 3 and 6 months. Pregnancy rates were determined by survival analysis. The EHFM participants (N=197) had a total pregnancy rate of 7 per 100 users over 12 months of use compared with 18.5 for the CMM group (N=164). The log rank survival test showed a significant difference (p<.01) in survival functions. Mean acceptability for both groups increased significantly over time (p<.0001). Continuation rates at 12 months were 40.6% for the monitor group and 36.6% for the mucus group. In comparison with the CMM, the EHFM method of family planning was more effective. All users had an increase in acceptability over time. Results are tempered by the high dropout rate.

Associated Clinical Trials


Mar 30, 2001·The Journal of International Medical Research·K May
Mar 30, 2001·The Journal of International Medical Research·L Severy
Mar 28, 2002·The Journal of Social Psychology·Lawrence J SeveryJames McNulty
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Jul 12, 2003·Journal of Nursing Scholarship : an Official Publication of Sigma Theta Tau International Honor Society of Nursing·Leona Vande VusseJaime Fox
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Oct 16, 2004·Fertility and Sterility·Marcos ArévaloIrit Sinai
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Mar 7, 2009·Journal of the American Board of Family Medicine : JABFM·Stephen R Pallone, George R Bergus
Apr 12, 2011·Contraception·James Trussell
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