Mikkelsen EM

Study questionTo what extent is male physical activity (PA) associated with fecundability (per-cycle probability of conception)?Summary answerPreconception levels of vigorous, moderate, or total PA were not consistently associated with fecu…

BackgroundThe use of fertility indicators to predict ovulation has largely been studied for contraceptive purposes, while less so as fertility-promoting tools.ObjectiveTo investigate the association between fertility indicators and fecundab…

PurposeTo evaluate the relationships among history of asthma, asthma severity, and spontaneous abortion (SAB).MethodsPregnancy Study Online is a preconception cohort study of North American couples. During the preconception period, female p…

BackgroundMigraine is common among females of reproductive age (estimated prevalence:17-24%) and may be associated with reproductive health through underlying central nervous system excitability, autoimmune conditions, and autonomic dysfunc…

Study questionTo what extent is female preconception antibiotic use associated with fecundability?Summary answerPreconception antibiotic use overall was not appreciably associated with fecundability.What is known alreadyAntibiotics are comm…

Study questionDo daughters of older mothers have lower fecundability?Summary answerIn this cohort study of North American pregnancy planners, there was virtually no association between maternal age ≥35 years and daughters' fecundability.Wha…

PurposeAsthma has been positively associated with irregular menses and infertility in some studies, but data are limited on the relation between asthma medication use and fecundability (i.e., average per-cycle probability of conception amon…

ObjectiveTo evaluate the association between pregravid use of a variety of contraceptive methods and subsequent fecundability.DesignProspective cohort study.SettingDenmark and North America, 2007-19.Participants17 954 women who had tried to…

The association between dietary fat and fertility is not well studied. We evaluated intakes of total fat, saturated fatty acids, monounsaturated fatty acids, polyunsaturated fatty acids, trans fatty acids (TFA), ω-3 fatty acids, and ω-6 fat…

BackgroundAnimal studies have shown that a high intake of galactose, a breakdown product of lactose, increases ovarian toxicity. Few epidemiologic studies, to our knowledge, have examined the association between dairy intake and fertility, …

Study questionTo what extent is preconception use of pain-relieving medication associated with female fecundability?Summary answerWomen who used naproxen or opioids had slightly lower fecundability than women who did not use any pain-reliev…

PurposeThe aim of this study was to evaluate the association between menstrual cycle characteristics in early life and adulthood and fecundability.MethodsPregnancy Study Online (PRESTO) is an Internet-based preconception cohort study of pre…