Length of human pregnancy and contributors to its natural variation
Jukic AM, Baird DD, Weinberg CR, McConnaughey DR, Wilcox AJ. Length of human pregnancy and contributors to its natural variation. Human Reproduction 2013, 28: 2848-2855. PMID: 23922246, PMCID: PMC3777570, DOI: 10.1093/humrep/det297.Peer-Reviewed Original ResearchConceptsLast menstrual periodLength of gestationGestational lengthPreterm birthGestational ageHuman pregnancyPregnancy lengthProspective cohort studySimilar gestational ageKaplan-Meier curvesBody mass indexSingleton live birthsEarly Pregnancy StudyPARTICIPANTS/MATERIALSUrinary hormone measurementsProportional hazards modelTiming of deliveryROLE OF CHANCEIntramural Research ProgramDate of conceptionCohort studySingleton pregnanciesMass indexMedian timeAlcohol intake