Pennoni F; Barbato M; A Latent Markov Model with Covariates to Study Unobserved Heterogeneity among Fertility Patterns of Couples Employing Natural Family Planning Methods. Front Public Health. 2017 Aug 15;5:186. doi: 10.3389/fpubh.2017.00186. eCollection 2017.
Conclusion
“We find that the conception pattern is mainly related to sexual intercourse behavior during the fertile window and to previous pregnancies. For the cohort under study, we predict a steep decline in the average conception rate across fertile windows.”