Fifty consecutive clients achieved pregnancy using a standardization modification of the Billings ovulation method (the Creighton Model Natural Family Planning System). Of 50 clients followed, 38 (76%) achieved pregnancy in the first cycle of fertility-focused intercourse, 45 of 50 (90%) achieved pregnancy by the third cycle and 49 of 50 achieved pregnancy by the sixth cycle (98%).
PMID 1479570 1479570 Hilgers et al. 1992, Hilgers 1992
Cite this article
Hilgers, T. W., Daly, K. D., Prebil, A. M., & Hilgers, S. K. (1992). Cumulative pregnancy rates in patients with apparently normal fertility and fertility-focused intercourse.. The Journal of reproductive medicine, 37(10), 864-6.
Hilgers TW, Daly KD, Prebil AM, Hilgers SK. Cumulative pregnancy rates in patients with apparently normal fertility and fertility-focused intercourse.. The Journal of reproductive medicine. 1992;37(10):864-6.
Keywords
Cervical Mucus Method, Coitus, Data Aggregation, Demographic Factors, Family Planning, Family Planning, Behavioral Methods, Fertility, Fertility Measurements, Menstrual Cycle, Menstruation, Natural Family Planning, Parity, Population, Population Dynamics, Pregnancy Rate, Reproduction, Research Methodology
Fifty consecutive clients achieved pregnancy using a standardization modification of the Billings ovulation method (the Creighton Model Natural Family Planning System). Of 50 clients followed, 38 (76%) achieved pregnancy in the first cycle of fertility-focused intercourse, 45 of 50 (90%) achieved pregnancy by the third cycle and 49 of 50 achieved pregnancy by the sixth cycle (98%).
Knowledge of the fertile and infertile phases of the menstrual cycle can be applied to conceive or to avoid pregnancy. Fertility intentions and sexual behaviors during the fertile time may influence whether and when pregnancy occurs. The Creighton Model FertilityCare System (CrMS) is a specific system of fertility appreciation used to conceive or to avoid pregnancy. The objective of this paper is to report intentions, behaviors, and pregnancy rates during use of the CrMS among couples who initially intended to avoid pregnancy.Data and methodsWe analyzed a prospective cohort study conducted in 17 CrMS centers across the USA and Canada, following 296 couples for up to one year after onset of initial use of the CrMS to avoid pregnancy. Baseline data included demographics, motivations, and pregnancy intentions for each partner. Couples contributed 2894 menstrual cycles, most of which had data collected (by questionnaires and daily diary) on cycle-specific pregnancy intentions, days of potential fertility, and fertility behaviors. Pregnancies were prospectively actively ascertained. We found a high concordance (91%) in cycle pregnancy intentions between partners. However, 44% of cycles with strong intentions to avoid pregnancy included intercourse on potentially fertile days or days of undetermined fertility status. Across all sensitivity scenarios, cumulative 13-cycle pregnancy rates with cycle intention to conceive ranged from 88.0% to 89.8%, and cumulative 13-cycle pregnancy rates with cycle intention to avoid ranged from 29.1% to 35.3%. In multivariate analysis, baseline motivations and intentions for pregnancy within 2 years were strongly correlated with the likelihood of pregnancy, more so than cycle intentions. The findings suggest that in some populations using natural family planning, baseline motivations and intentions may be more strongly related to pregnancy rates than cycle intentions. Our findings also highlight essential elements for evaluating correct use, including complete recording of intercourse and its timing.
Horodenchuk Z et al., 2020·Kwartalnik Naukowy Fides et Ratio
To assess the outcomes of treatment the couples with infertility or recurrent miscarriage with restorative reproductive approach and to identify predictors of success. It was a retrospective study of 282 married couples, who were included in the program in 2 outpatient gynaecological centers in May 2010 - December 2014. The couples were observed to the end of pregnancy (or pregnancies) or withdrawal from the program. All the couples were taught to track the cycle with the Creighton Model FertilityCare System or the sympto-thermal method, and almost all received additional medical treatment. The main outcome was live birth, the secondary outcomes included conceptions, unsuccessful pregnancies, low birth weight and prematurity. In life-table analysis, the adjusted cumulative proportion of first conceptions for those completing up to 24 months of NPT treatment was 77.7% (crude proportion 47.9%). The adjusted cumulative proportion of live births was 73.6% (117 births, crude proportion 41.5%). Mean time to achieving pregnancy was 8 months. All the births except one were singleton. There were only 3 preterm births. The favorable predictors of live birth were younger age, shorter time of trying for baby, good compliance, pregnancy in history. The unfavorable were hyperprolactinemia, uterine fibroids, endometriosis, male factor. The outcomes of restorative reproductive treatment the couples with infertility or recurrent miscarriage in Ukraine were comparable to those in Ireland and Canada.
We evaluated outcomes in couples treated for infertility with natural procreative technology (NaProTechnology [corrected] NPT), a systematic medical approach for optimizing physiologic conditions for conception in vivo, from an Irish general practice. All couples receiving treatment from 2 NPT-trained family physicians between February 1998 and January 2002 were studied. The main outcome was live birth, and secondary outcomes included conceptions and multiple births. Crude proportions and adjusted life-table proportions were calculated per 100 couples. A total of 1239 couples had an initial consult for NPT, of which 1072 had been trying for at least a year to conceive and initiated treatment. The average female age was 35.8 years, the mean duration of attempting to conceive was 5.6 years, 24% had a prior birth, and 33% had previously attempted treatment with assisted reproductive technology (ART). All couples were taught to identify the fertile days of the menstrual cycle with the Creighton Model FertilityCare System, and most received additional medical treatment, including clomiphene (75%). In life-table analysis, the cumulative proportion of first live births for those completing up to 24 months of NPT treatment was 52.8 per 100 couples. The crude proportion was 25.5. Younger couples and couples without previous ART attempts had higher rates of live birth. Among live births, there were 4.6% twin births. NPT provided by trained general practitioners had live birth rates comparable to cohort studies of more invasive treatments, including ART. Further studies are warranted to compare NPT directly to other treatments.