OBJECTIVE: To assess changes in human fertility over time. DESIGN: Time-trend analyses and age-period-cohort modeling. SETTING: Sweden, 1983-1993. PATIENT(S): All primiparous women aged > or =20 years during the study period. There were 401,653 women who were identified through the nationwide Medical Birth Register. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Risk of subfertility, defined as > or =1 year of involuntary childlessness. RESULT(S): Subfertility problems decreased dramatically over successive maternal birth cohorts. Further, the risk of subfertility increased with age and decreased with increasing formal education. CONCLUSION(S): A decrease in male fertility cannot be ruled out on the basis of these results, but if present, it is minor and totally outweighed by other favorable developments. As the main explanation for our findings, we propose a decrease in the prevalence of secondary subfertility as a result of the eradication of gonorrhea.
OBJECTIVE: To assess changes in human fertility over time. DESIGN: Time-trend analyses and age-period-cohort modeling. SETTING: Sweden, 1983-1993. PATIENT(S): All primiparous women aged > or =20 years during the study period. There were 401,653 women who were identified through the nationwide Medical Birth Register. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Risk of subfertility, defined as > or =1 year of involuntary childlessness. RESULT(S): Subfertility problems decreased dramatically over successive maternal birth cohorts. Further, the risk of subfertility increased with age and decreased with increasing formal education. CONCLUSION(S): A decrease in male fertility cannot be ruled out on the basis of these results, but if present, it is minor and totally outweighed by other favorable developments. As the main explanation for our findings, we propose a decrease in the prevalence of secondary subfertility as a result of the eradication of gonorrhea.
Authors: Alvaro J Idrovo; Luz Helena Sanìn; Donald Cole; Jorge Chavarro; Heidy Cáceres; Javier Narváez; Mauricio Restrepo Journal: Int Arch Occup Environ Health Date: 2005-05-26 Impact factor: 3.015
Authors: Fabrícia Gimenes; Raquel P Souza; Jaqueline C Bento; Jorge J V Teixeira; Silvya S Maria-Engler; Marcelo G Bonini; Marcia E L Consolaro Journal: Nat Rev Urol Date: 2014-10-21 Impact factor: 14.432
Authors: F Yarde; F J M Broekmans; K M van der Pal-de Bruin; Y Schönbeck; E R te Velde; A D Stein; L H Lumey Journal: Hum Reprod Date: 2013-08-21 Impact factor: 6.918