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  1. Article

    Open Access

    Sleep duration and plasma leptin concentrations in early pregnancy among lean and overweight/obese women: a cross sectional study

    Early-pregnancy short sleep duration is predictive of gestational diabetes and preeclampsia; mechanisms for these associations are unknown. Leptin, an adipocyte-derived peptide involved in regulating food inta...

    Chunfang Qiu, Ihunnaya O Frederick, Tanya K Sorensen in BMC Research Notes (2014)

  2. Article

    Open Access

    Placental mitochondrial DNA content and placental abruption: a pilot study

    Mitochondrial biogenesis and adequate energy production are important for embryogenesis and placentation. Previous studies documented alterations in maternal blood mitochondrial DNA (mtDNA) copy number—a marke...

    Chunfang Qiu, Sixto E. Sanchez, Karin Hevner, Daniel A. Enquobahrie in BMC Research Notes (2015)