OBJECTIVE To determine whether the relationship between previous miscarriage and risk of preterm birth changed over the period 1980-2008, and to determine whether the pattern varied according to the cause of the preterm birth. DESIGN Linked birth databases. SETTING All Scottish NHS hospitals. POPULATION A total of 732 719 nulliparous women with a first live birth between 1980 and 2008. ...

Background Low birth weight is one of the most important health indicators in evaluating pregnancy care worldwide. We aimed to evaluate the effect of cell phones used in pregnancy on fetal growth and preterm labor. Materials and Methods The search process included screening the rel...

BACKGROUND Preterm birth defined as birth prior to 37 weeks of gestation is caused by different risk factors and implies an increased risk for disease and early death for the child. The aim of the study was to investigate the effect of maternal stress during pregnancy on the risk of preterm birth. METHODS A case-control study that included 340 women; 168 women who gave birth preterm and 172 w...

objective : the study evaluated the efficacy and safety of vaginal rogesterone on prevention of recurrent preterm labor. materials and methods: total number of 70 patients with preterm labor treated with intravenous magnesium sulfate in perinatology department of valiasr hospital entered to a randomized clinical trial. treatment group after inhibition of preterm labor with magnesium sulfate rec...

BACKGROUND Preterm birth, defined as birth occurring before 37 weeks gestation, is one of the most significant contributors to neonatal mortality and morbidity, with long-term adverse consequences for health, and cognitive outcome. OBJECTIVE The aim of the present study was to identify risk factors of preterm birth (≤36+6 weeks gestation) among singleton births and to quantify the contributio...

BACKGROUND A higher risk of preterm birth among black women than among white women is well established in the United States. We compared differences in preterm birth between non-Hispanic black and white women in Canada and the US, hypothesizing that disparities would be less extreme in Canada given the different historical experiences of black populations and Canada's universal health care syst...

Moderate and late preterm births account for the majority of preterm babies. The common perception that birth at 32-36 weeks' gestation carries few risks is now being challenged, as these babies have increased risk of neonatal mortality and morbidity. However, spontaneous labour at this gestation frequently has no specific, easily identifiable precursor, although preterm birth per se has a numb...

Background: High levels of maternal stress have been linked to preterm births. However, findings from previous studies are inconsistent due to the varied use of stress measures. This study examined the effect of maternal stress on preterm birth, using both psychosocial and physiological measures. Methods: This study was conducted among 231 pregnant women enrolled during their first prenatal car...

BACKGROUND Rates of preterm birth are rising worldwide. Studies from the United States and Latin America suggest that much of this rise relates to increased rates of medically indicated preterm birth. In contrast, European and Australian data suggest that increases in spontaneous preterm labour also play a role. We aimed, in a population-based database of 5 million people, to determine the temp...

BACKGROUND Low plasma folate concentrations in pregnancy are associated with preterm birth. Here we show an association between preconceptional folate supplementation and the risk of spontaneous preterm birth. METHODS AND FINDINGS In a cohort of 34,480 low-risk singleton pregnancies enrolled in a study of aneuploidy risk, preconceptional folate supplementation was prospectively recorded in th...