Objective Studies have reported an increased risk of spontaneous preterm birth associated with elevated prepregnancy body mass index (BMI) among nulliparous but not multiparous women. We examined whether changes in BMI and weight between pregnancies contributed to risk of preterm birth among obese (BMI > 29 kg/m(2)) women. Study Design This study utilized maternally linked California birth reco...

BACKGROUND Many stillbirths show evidence of fetal growth restriction, and most occur at preterm gestational age. The objective of this study is to compare birth weights at preterm gestational ages between live births and stillbirths, and between those occurring before or during labour. METHODS Based on singleton births from the United States (U.S.) 2003-2005 (n=902,491) and Sweden 1992-2001 ...

Objective: To evaluate cervical length (CL) and fetal fibronectin (fFN) as predictors of spontaneous preterm birth (SPTB) in patients with congenital uterine anomalies. Methods: A retrospective cohort of patients with uterine anomalies and singleton pregnancies >22 weeks delivered by one maternal fetal medicine practice from 2005-2012 who underwent routine CL and fFN testing from 22-32 weeks wa...

OBJECTIVE To investigate the relation between air pollution exposure and preterm birth in Shanghai, China. METHODS We examined the effect of ambient air pollution on preterm birth using time-series approach in Shanghai in 2004. This method can eliminate potential confounding by individual risk factors that do not change over a short period of time. Daily numbers of preterm births were obtaine...

Background Preterm birth significantly affects the neonates’ survival. It also increases the risk of neonatal complications, prolongs the hospitalization period, and imposes high costs on the public health system. This study is aimed to assess the risk factors of the preterm birth. Materials and Methods This case-control stud...

backgroundeach year about 32.4 million of children are born with low birth weight, which is below the 10th percentile for their gestational ages; moreover, about fifteen million of them are premature. actually, about 60% of neonatal deaths occur in low birth weight neonates related to their prematurity. this study aimed to determine the neonatal death rate and the most common causes of the hosp...

The high prevalence, increasing frequency, and adverse outcomes for mothers and infants of preterm birth have led to heightened awareness of this public health concern. The causes of preterm birth are likely to be multifactorial, with genetic, infectious, nutritional, behavioral, and other environmental contributors. Because of important differences in the physiology of human pregnancy and that...

OBJECTIVE To determine the relation between overweight and obesity in mothers and preterm birth and low birth weight in singleton pregnancies in developed and developing countries. DESIGN Systematic review and meta-analyses. DATA SOURCES Medline and Embase from their inceptions, and reference lists of identified articles. STUDY SELECTION Studies including a reference group of women with n...