Jennifer J. Yland

STUDY QUESTION: To what extent do self-reported sleep duration and non-daytime work schedules in either partner affect the rate of spontaneous abortion (SAB)? SUMMARY ANSWER: Incidence of SAB had little association with female sleep durati…

ObjectiveTo use self-reported preconception data to derive models that predict the risk of miscarriage.DesignProspective preconception cohort study.SettingNot applicable.PatientsStudy participants were female, aged 21-45 years, residents of…

STUDY QUESTION: To what extent is preconception maternal or paternal coronavirus disease 2019 (COVID-19) vaccination associated with miscarriage incidence? SUMMARY ANSWER: COVID-19 vaccination in either partner at any time before conceptio…

OBJECTIVES: To evaluate the association between preconception contraceptive use and miscarriage. DESIGN: Prospective cohort study. SETTING: Residents of the United States of America or Canada, recruited from 2013 until the end of 2022. P…

PURPOSE: To evaluate the relationships among history of asthma, asthma severity, and spontaneous abortion (SAB). METHODS: Pregnancy Study Online is a preconception cohort study of North American couples. During the preconception period, fe…

OBJECTIVE: To compare the effectiveness and safety of 1 cycle of assisted reproductive technology (ART) vs. 3 cycles of intrauterine insemination (IUI). DESIGN: Target trial emulation using observational data. SETTING: A healthcare claims…

STUDY QUESTION: What are the comparative pregnancy outcomes in women who receive up to six consecutive cycles of ovulation induction with letrozole versus clomiphene citrate? SUMMARY ANSWER: The risks of pregnancy, livebirth, multiple gest…

STUDY QUESTION: Can we derive adequate models to predict the probability of conception among couples actively trying to conceive? SUMMARY ANSWER: Leveraging data collected from female participants in a North American preconception cohort s…

PURPOSE: To prospectively examine the association between time-to-pregnancy (TTP) and postpartum depression (PPD) and determine whether perceived stress during early pregnancy mediated this association. METHODS: In Pregnancy Study Online, …

STUDY QUESTION: Is a history of periodontitis among women associated with reduced fecundability? SUMMARY ANSWER: A history of periodontitis, as assessed by three different self-reported measures, may be associated with reduced fecundabilit…

Endometriosis is a common gynecologic disease defined by the presence of endometrial-like tissue outside the uterine cavity. While its etiology is largely unknown, accumulating evidence suggests that inflammation plays a major role. Our obj…

OBJECTIVE: To evaluate the association between pregravid use of a variety of contraceptive methods and subsequent fecundability. DESIGN: Prospective cohort study. SETTING: Denmark and North America, 2007-19. PARTICIPANTS: 17 954 women wh…

RESEARCH QUESTION: What is the association between endometrioma-affected ovaries, their follicular fluid inflammatory microenvironment, and ovary-specific oocyte and embryo yield and quality? DESIGN: Exposure-matched prospective cohort stu…

Background: The complexity of endometriosis pathophysiology, the diversity of disease phenotypes, and the fact that the disease only occurs in menstruating primates have limited the pace of progress in our understanding of this very common …