Steiner, Anne Z Impact of female age and nulligravidity on fecundity in an older reproductive age cohort. [electronic resource] - Fertility and sterility Jun 2016 - 1584-1588.e1 p. digital Publication Type: Clinical Trial; Journal Article ISSN: 1556-5653 Standard No.: 10.1016/j.fertnstert.2016.02.028 doi Subjects--Topical Terms: AdultAge FactorsCohort StudiesFemaleFertility--physiologyGravidity--physiologyHumansInfertility, Female--diagnosisPregnancyPregnancy Rate--trendsProspective StudiesReproduction--physiologySurveys and QuestionnairesTime-to-Pregnancy--physiology