2002
Physical Activity, Body Mass Index, and Ovulatory Disorder Infertility
Rich-Edwards JW, Spiegelman D, Garland M, Hertzmark E, Hunter DJ, Colditz GA, Willett WC, Wand H, Manson JE. Physical Activity, Body Mass Index, and Ovulatory Disorder Infertility. Epidemiology 2002, 13: 184-190. PMID: 11880759, DOI: 10.1097/00001648-200203000-00013.Peer-Reviewed Original ResearchConceptsBody mass indexOvulatory disorder infertilityHealth Study IIOvulatory infertilityRelative riskMass indexVigorous activityNurses' Health Study IIVigorous-intensity exerciseLower relative riskAmerican womenAdiposity levelsIntensity exercisePhysical activitySedentary lifestyleBMI distributionInfertilityU.S. womenStudy IIWomenUnderweightRiskWeekly activitiesAssociationHours
1998
Menstrual Cycle Characteristics and History of Ovulatory Infertility in Relation to Breast Cancer Risk in a Large Cohort of US Women
Garland M, Hunter D, Colditz G, Manson J, Stampfer M, Spiegelman D, Speizer F, Willett W. Menstrual Cycle Characteristics and History of Ovulatory Infertility in Relation to Breast Cancer Risk in a Large Cohort of US Women. American Journal Of Epidemiology 1998, 147: 636-643. PMID: 9554602, DOI: 10.1093/oxfordjournals.aje.a009504.Peer-Reviewed Original ResearchConceptsMultivariate relative riskHealth Study IIMenstrual cycle characteristicsBreast cancer riskRelative riskOvulatory infertilityBreast cancerCancer riskLonger menstrual cycle lengthNurses' Health Study IICycle lengthUsual cycle lengthProspective cohort studyMenstrual cycle lengthOvulatory menstrual cyclesCohort studyBaseline questionnaireMenstrual cycleLarge cohortProtective effectUS womenAge 18Study IIInfertilityCycle characteristics
1997
Oral Contraceptives and Ovulatory Causes of Delayed Fertility
Chasan-Taber L, Willett W, Stampfer M, Spiegelman D, Rosner B, Hunter D, Colditz G, Manson J. Oral Contraceptives and Ovulatory Causes of Delayed Fertility. American Journal Of Epidemiology 1997, 146: 258-265. PMID: 9247010, DOI: 10.1093/oxfordjournals.aje.a009261.Peer-Reviewed Original ResearchConceptsOvulatory causeOral contraceptivesMultivariate relative riskOral contraceptive useReturn of fertilityHistory of infertilityCase-control studyPercent of casesDuration of useMethod of contraceptionOvulatory infertilityPrevious pregnancyEventual pregnancyHormonal disordersRelative riskContraceptive useYounger agePregnancyMarried nursesNursesWomenContraceptivesInfertilityDelayed fertilityFirst use