Studies to evaluate use-effectiveness and cost-effectiveness of natural family planning (NFP) were conducted in Liberia and Zambia. The Liberian programme provided uni-purpose NFP services to 1055 clients mainly in rural areas; the Zambian programme provided NFP services integrated with MCH to 2709 clients predominantly in urban areas. The one-year life table continuation and unplanned pregnancy rates were 78.9 and 4.3 per 100 woman-years in Liberia, compared to 71.2 and 8.9 in Zambia. However, high rates of loss to follow-up mandate caution in interpretation of these results, especially in Zambia. More women progressed to autonomous NFP use in Liberia (58%) than in Zambia (35.3%). However, programme costs per couple-year protection were lower in Zambia (US$25.7) than in Liberia (US$47.1). Costs per couple-year protection were higher during learning than autonomy, and declined over time. These studies suggest that NFP programmes can achieve acceptable useand cost-effectiveness in Africa.
natural family planning effectiveness Africa Liberia Zambia, NFP program evaluation use-effectiveness cost-effectiveness, Gray Kambic natural family planning developing countries, natural family planning continuation rates unplanned pregnancy Africa, NFP integrated maternal child health services Zambia, cost per couple year protection natural family planning, fertility awareness program evaluation rural urban Africa, natural family planning autonomous use progression rates, NFP life table analysis pregnancy rates developing world, billings ovulation method sympto-thermal Africa effectiveness
PMID 8478373 8478373 DOI 10.1017/s0021932000020538 10.1017/s0021932000020538 Gray et al. 1993, Gray 1993
Cite this article
Gray, R. H., Kambic, R. T., Lanctot, C. A., Martin, M. C., Wesley, R., & Cremins, R. (1993). Evaluation of natural family planning programmes in Liberia and Zambia. Journal of biosocial science, 25(2), 249-258. https://doi.org/10.1017/s0021932000020538
Gray RH, Kambic RT, Lanctot CA, Martin MC, Wesley R, Cremins R. Evaluation of natural family planning programmes in Liberia and Zambia. J Biosoc Sci. 1993;25(2):249-258. doi:10.1017/s0021932000020538
Gray, R. H., et al. "Evaluation of natural family planning programmes in Liberia and Zambia." Journal of biosocial science, vol. 25, no. 2, 1993, pp. 249-258.
To summarize best available prospective data on typical and perfect use effectiveness of fertility awareness-based methods for avoiding pregnancy. We conducted a systematic review of studies published in English, Spanish, French, or German by June 2017 in MEDLINE, EMBASE, CINAHL, Web of Science, and ClinicalTrials.gov. We reviewed 8,755 unique citations and included 53 studies that contained 50 or greater women using a specific fertility awareness-based method to avoid pregnancy, calculated life table pregnancy probabilities or Pearl rates, and prospectively measured pregnancy intentions and outcomes. We systematically evaluated study quality. TABULATION, INTEGRATION, Of 53 included studies, we ranked 0 high quality, 21 moderate quality, and 32 low quality for our question of interest. Among moderate-quality studies, first-year typical use pregnancy rates or probabilities per 100 woman-years varied widely: 11.2-14.1 for the Standard Days Method, 13.7 for the TwoDay Method, 10.5-33.6 for the Billings Ovulation Method, 4-18.5 for the Marquette Mucus-only Method, 9.0-9.8 for basal body temperature methods, 13.2 for single-check symptothermal methods, 11.2-33.0 for Thyma double-check symptothermal methods, 1.8 for Sensiplan, 25.6 for Persona, 2-6.8 for the Marquette Monitor-only Method, and 6-7 for the Marquette Monitor and Mucus Method. First-year perfect use pregnancy rates or probabilities among moderate-quality studies were 4.8 for the Standard Days Method, 3.5 for the TwoDay Method, 1.1-3.4 for the Billings Ovulation Method, 2.7 for the Marquette Mucus Method, 0.4 for Sensiplan, 12.1 for Persona, and 0 for the Marquette Monitor. Studies on the effectiveness of each fertility awareness-based method are few and of low to moderate quality. Pregnancy rates or probabilities varied widely across different fertility awareness-based methods (and in some cases, within method types), even after excluding low-quality studies. Variability across populations studied precludes comparisons across methods.
Fehring RJ et al., 2017·J Obstet Gynecol Neonatal Nurs·
To analyze the effectiveness of an online, nurse-managed natural family planning (NFP) program among breastfeeding women and subgroups of these women.
Longitudinal comparative cohort study.
A university-based online NFP education program and menstrual cycle charting system. Women (N = 816) with a mean age of 30.3 years (standard deviation = 4.5) who registered to use the online NFP system and indicated they were breastfeeding. Participants tracked their fertile times with an electronic hormone fertility monitor (EHFM), cervical mucus monitoring, or both. All unintended pregnancies were evaluated by professional nurses. The correct use pregnancy rates were 3 per 100 users over 12 cycles of use, and typical rates were 14 per 100 at 12 cycles of use. At 12 cycles of use, total pregnancy rates were 16 per 100 for electronic hormone fertility monitor users (n = 380), 81 per 100 among mucus-only users (n = 45), and 14 per 100 for electronic hormone fertility monitor plus mucus users (n = 391). Use of a nurse-managed online NFP program for women can be effective to help women avoid pregnancy while breastfeeding, especially with correct and consistent use.
Fehring RJ et al., 2016·MCN Am J Matern Child Nurs·
The aims of this study were to determine and compare extended use-effectiveness of an online nurse-managed fertility education service program among women (and subgroups of women) seeking to avoid pregnancy. This was a 24-month prospective study of a university-based online Web site with 663 nonbreastfeeding women using an online charting system to avoid pregnancy. Participants tracked their fertility online with either cervical mucus monitoring, electronic hormonal fertility monitoring, or both fertility indicators. Unintended pregnancies were validated by professional nurses. Participants had a mean age of 30.4 years (SD = 6.3) and mean 1.7 children (SD = 2.0). Among the 663 nonbreastfeeding participants there were 2 unintended pregnancies per 100 at 24 cycles of correct use and 15 pregnancies at 24 cycles of typical use. However, the 212 women using the electronic fertility monitor had a typical use unintended pregnancy rate of 6 at 24 cycles of use in comparison with the 118 women using cervical mucus monitoring that had a typical use pregnancy rate of 19 at 24 cycles and with the 333 women using both fertility indicators that had a pregnancy rate of 18 at 24 cycles of use. CLINICAL Use of the fertility monitor to estimate fertility among nonbreastfeeding women provides the most secure method of avoiding pregnancy.
Comparative Studies · Contraception Versus Fertility Awareness
To assess physicians' knowledge, attitudes, and practice with respect to four evidence-based natural family planning (NFP) Standard Days, cervical mucus, basal body temperature, and the lactational amenorrhea method. We undertook a cross-sectional survey of a random sample of family physicians and all gynaecologists in British Columbia (n = 460) who have women of reproductive age in their practice, as well as all affiliated residents (n = 239). Main outcome measures were (1) physicians' attitudes towards NFP and their perceptions of its effectiveness; (2) the relationship between physicians' demographic factors, their personal experience or beliefs, and their attitudes and knowledge; and (3) how these factors affect the counselling physicians offer their patients. The survey response rate was 44%. Only 3% to 6% of physicians had correct knowledge of the effectiveness in perfect use of the NFP methods cited in this study. Fifty percent of physicians who responded mention NFP to their patients as an option for contraception, and 77% of physicians mention NFP as an option to couples trying to conceive. Family physicians and residents were much more likely than gynaecologists or gynaecology residents to mention NFP during counselling. Older physicians were more likely to mention NFP than younger physicians and also had more personal experience with NFP. Most physicians in our study underestimated the effectiveness of NFP methods, and only a small proportion of physicians provide information about NFP during contraceptive counselling. Physicians need better understanding of modern methods of NFP to provide evidence-based contraceptive counselling to selected highly motivated patients who prefer NFP as a contraceptive choice.