Référence: Impact of instruction in the Creighton Model FertilityCare System on time to pregnancy in couples of proven fecundity: results of a randomised trial
Stanford, Joseph B.; Smith, Ken R.; Varner, Michael W. Impact of instruction in the Creighton Model FertilityCare System on time to pregnancy in couples of proven fecundity: results of a randomised trial. Paediatric and perinatal epidemiology 2014: PMID: 25225008 PMCID: PMC4861655