Preeclampsia was defined as persistent blood pressure 140/90mmHg accompanied by proteinuria > 300mg/24h or++ proteinuria determined by urinary dipstick analysis (Multistix 7, Siemens Healthcare, Tarrytown, NY, USA)

Preeclampsia was defined as persistent blood pressure 140/90mmHg accompanied by proteinuria > 300mg/24h or++ proteinuria determined by urinary dipstick analysis (Multistix 7, Siemens Healthcare, Tarrytown, NY, USA). or postpartum hemorrhage. == Results == The prevalence of subclinical hypothyroidism among pregnant women was 17% (n= 19), and the number of overall adverse pregnancy outcomes was increased (p= 0. 02) compared with that in euthyroid pregnant women. Preeclampsia, poor Apgar score, and postpartum hemorrhage were more frequent in the subclinical hypothyroidism group than in the euthyroid group (p= 0. 04, p= 0. 001 andp= 0. 03, respectively), and more women showed prolonged gestation and gave birth later on than 41 weeks of gestation than in the euthyroid group (p= 0. 04). Compared with euthyroid, nonpregnant regulates, a physiological upregulation of mitochondrial function was observed in euthyroid pregnant women. This was impaired in pregnant women with subclinical hypothyroidism. Compared with euthyroid, nonpregnant controls, pregnant women had increased ROS regardless of their thyroid status. == Conclusion == We speculate that the unfavorable effects on mitochondrial function in women with subclinical hypothyroidism may be associated with higher prevalence of adverse pregnancy outcomes. Keywords: Subclinical hypothyroidism, Pregnancy end result, Mitochondrial dysfunction, Mitochondrial membrane potential, Reactive oxygen species Abbreviations: TSH, thyroid-stimulating hormone; TPOAb, thyroid peroxidase antibody; fT4, free thyroxine; tT3, total triiodothyronine; TMRM, tetramethylrhodamine methyl ester; ROS, reactive oxygen species; PBMC, peripheral blood mononuclear cells; MMP, mitochondrial membrane potential; carboxy-H2DCFDA, 5(6)-carboxy-2′-7′-dichlorodihydrofluoresceindiacetate; GA, gestational age group; BMI, body mass index == Intro == Subclinical hypothyroidism is defined as increased level of thyroid-stimulating hormone (TSH) and levels of thyroid hormones within the reference range. Subclinical hypothyroidism is the most frequent thyroid disease during pregnancy, compared with overt hypothyroidism and overt and subclinical hyperthyroidism[1]. Depending on the cut-off values used for the definition of subclinical hypothyroidism, ethnicity, and study design, the reported prevalence varies between 1 . 5% and 4%[2],[3],[4],[5]. It is well documented that overt hypothyroidism is associated with increased risk of obstetric complications such as miscarriage, gestational hypertension, preterm delivery, stillbirths, and perinatal deaths[6],[7],[8]. However , although studies of maternal subclinical hypothyroidism have also suggested a relation to adverse effects[9],[10],[11], this relation is not as well established. A SLC7A7 number of cellular functions are regulated by thyroid hormones, and one major function is that of mitochondrial energy production and biogenesis[12]. GSK429286A Several studies possess reported impaired thyroid hormone-regulated mitochondrial function in patients with subclinical hypothyroidism[13],[14],[15]. The aim of the present study was to examine pregnancy outcomes in women with subclinical hypothyroidism, and the relation to a possible mitochondrial dysfunction, as well as to examine whether mitochondrial function was influenced by pregnancy. == Material and methods == Women in their third trimester of pregnancy who also consulted the Department of Obstetrics, Naestved Hospital, Region Zealand, Denmark, between June 2012 and January 2013 were included. Women with known thyroid disease, diabetes, and those receiving any medical treatment for thyroid disease were excluded. In total, 115 pregnant women (all of Caucasian ethnicity) were included. Two women were consequently excluded because they gave birth at home and their data were unavailable. The remaining 113 data units were total. All participants were interviewed to ensure full investigation of their obstetric history. Body mass index (BMI) before pregnancy was obtained from general practitioner records. All women were examined during the first trimester, and gestational age group (GA) was determined by ultrasound. GA at delivery, placental abruption, preeclampsia, cesarean section, postpartum hemorrhage, Apgar rating, birth weight, and any severe event occurring during the period from inclusion in the study until delivery were obtained from hospital records. Negative pregnancy end result was defined as preterm delivery (GA <37 weeks), preeclampsia, placental abruption, Apgar score <7 points 1 minute after delivery, postpartum hemorrhage (> 500 mL), or delivery later on than 41 weeks after gestation. Preeclampsia was defined as persistent blood pressure 140/90 mm Hg accompanied by proteinuria > 300 mg/24 h or ++ proteinuria determined by urinary dipstick analysis (Multistix 7, Siemens Healthcare, Tarrytown, NY, USA). The definition of negative pregnancy end result was based on former studies of hypothyroidism during pregnancy, and all criteria carry potential risks of increased mortality and morbidity. To GSK429286A ensure that the control group of age-matched, euthyroid, nonpregnant women (n= 42) had not consulted the hospital regarding emergency or chronic disease, participants were recruited from a population study performed at Naestved Hospital during the same period[16]. The control group was included to establish the normal reference GSK429286A range of mitochondrial membrane potential (MMP) and production of reactive oxygen species (ROS). All laboratory tests were performed at the same laboratory using.