Raatikainen, Kaisa Prolonged time to pregnancy is associated with a greater risk of adverse outcomes. [electronic resource] - Fertility and sterility Aug 2010 - 1148-51 p. digital Publication Type: Journal Article ISSN: 1556-5653 Standard No.: 10.1016/j.fertnstert.2009.10.058 doi Subjects--Topical Terms: Apgar ScoreBirth Weight--physiologyFemaleFertility--physiologyHumansInfant, NewbornInfant, Newborn, Diseases--epidemiologyPregnancyPregnancy Complications--epidemiologyPregnancy Outcome--epidemiologyRegression AnalysisReproductive Techniques, Assisted--statistics & numerical dataRiskSurveys and QuestionnairesTime Factors