OBJECTIVE: To investigate a previously hypothesized relation between natural hair color and endometriosis. DESIGN: Prospective cohort study. SETTING: Nurses' Health Study II with 10 years of follow-up. PARTICIPANT(S): A total of 90,065 w…
PURPOSE: To compare pregnancy rates of embryo transfers performed by a patient's own IVF physician to pregnancy rates of embryo transfers performed by other physicians on the IVF team. METHODS: Retrospective cohort study; University hospit…
Because few well-designed epidemiologic studies exist, the incidence, prevalence, and risk factors for endometriosis remain uncertain. However, despite the relative paucity of studies, some consistent observations have emerged-findings that…
The authors investigated the relations of demographic, anthropometric, and lifestyle factors with endometriosis in the Nurses' Health Study II prospective cohort. During 10 years of follow-up (1989-1999), 1,721 cases of laparoscopically con…
OBJECTIVE: To investigate the relation between the fetal environment and endometriosis. DESIGN: Prospective cohort study. SETTING: Nurses' Health Study II with 10 years of follow-up. PARTICIPANT(S): Eighty-four thousand, four hundred for…
OBJECTIVE: To clarify the temporal complexities of the relation between reproductive factors and endometriosis. METHODS: We analyzed 10 years of prospective data from the Nurses' Health Study II cohort. Information was obtained through que…
The epidemiologic study of endometriosis presents researchers with unique challenges. As a result, few well-designed studies have been published. The authors briefly describe the primary pathogenic hypotheses, discuss methodologic issues sp…
Two major methodological problems that impact clinical research in endometriosis are the absence of a low-cost, highly reliable method for diagnosing endometriosis and the possibility that endometriosis is actually multiple different diseas…
Advances in understanding the epidemiology of endometriosis have lagged behind other diseases because of methodologic problems related to disease definition and control selection. Nevertheless, a better picture of the epidemiology of endome…