نتایج جستجو برای: weeks

تعداد نتایج: 217988  

2017
Lu Cheng Bin Zhang Tongzhang Zheng Jie Hu Aifen Zhou Bryan A. Bassig Wei Xia David A. Savitz Stephen Buka Chao Xiong Joseph M. Braun Yaqi Zhang Yanqiu Zhou Xinyun Pan Chuansha Wu Youjie Wang Zhengmin Qian Aimin Yang Megan E. Romano Kunchong Shi Shunqing Xu Yuanyuan Li

Prenatal cadmium (Cd) exposure has been associated with adverse birth outcomes, but the findings of previous studies are inconsistent. We measured Cd concentrations in urine samples at or near 13, 24, and 35 gestational weeks from 282 women in Wuhan, China. We used generalized estimating equation models to assess the associations between maternal creatinine adjusted urinary Cd concentrations at...

Journal: :Annals of epidemiology 2011
Nathalie Auger Philippe Gamache Jessica Adam-Smith Sam Harper

PURPOSE To evaluate relative and absolute relationships between preterm birth (PTB) and neighborhood education over time. METHODS Live births in Québec, Canada, were obtained for 1990-1995, 1996-2000, and 2001-2006. Mean maternal education and proportion of females with no high school diploma were expressed as continuous cumulative rank scores for 10,923 neighborhoods. We estimated the relati...

Journal: :Journal of obstetric, gynecologic, and neonatal nursing : JOGNN 2007
Patricia E Hershberger

OBJECTIVE To describe the lived experience of pregnant women who used donor oocytes for conception. DESIGN Qualitative, using a descriptive phenomenologic approach. SETTING Interviews were completed at a location and setting selected by the participant. Of the 16 interviews, 13 were conducted at the participant's home, 1 was conducted at a private office, and 2 were conducted by telephone. ...

Journal: :American journal of epidemiology 2002
Britt Clausson Fredrik Granath Anders Ekbom Stefan Lundgren Anna Nordmark Lisa B Signorello Sven Cnattingius

Epidemiologic studies have been unable to conclusively evaluate whether caffeine intake during pregnancy is associated with reduced birth weight and/or fetal growth restriction. The authors conducted a prospective, population-based cohort study to investigate the effect of caffeine on birth weight, gestational age, and birth weight standardized for gestational age (birth weight ratio). Of 953 w...

Journal: :The Turkish journal of pediatrics 2011
Xiao Yang Weiyue Zeng

We aimed in this study to determine the cardiac reserve in preterm infants with phonocardiogram. One hundred and fifty-four preterm infants participated in this study. The ratio of the first heart sound to the second heart sound (S1/S2), the ratio of diastolic to systolic duration (D/S) and the cardiac contractility change trend after stimulation (CCCTS) were measured in all infants. The preter...

2016
Yan Huang Wen Tang Yi Mu Xiaohong Li Zheng Liu Yanping Wang Mingrong Li Qi Li Li Dai Juan Liang Jun Zhu

OBJECTIVE The accuracy of a population-based sex ratio at birth (SRB) in China has long been questioned. To depict a more accurate profile, the present study used data from a national surveillance system for health facility births to explore the characteristics of SRB in China. METHODS Data from China's National Maternal Near Miss Surveillance System between 2012 and 2015 were used. We restri...

2014
Luciano Marcondes Machado Nardozza Ana Paula Passos Edward Araujo Júnior Rafael Frederico Bruns Antonio Fernandes Moron

OBJECTIVE To establish reference intervals for the fetal cisterna magna volume by means of two-dimensional (2D) method using the multiplanar mode of three-dimensional ultrasonography. MATERIALS AND METHODS Cross-sectional study with 224 healthy pregnant women between the 17th and 29th gestational weeks. The volume was automatically obtained by multiplying the three major axes in axial and sag...

Journal: :The Journal of pediatrics 2014
Kim Stene-Larsen Ragnhild Eek Brandlistuen Astri M Lang Markus A Landolt Beatrice Latal Margarete E Vollrath

OBJECTIVE To investigate the risk of communication impairments at age 18 and 36 months in children born early term (gestational weeks 37-38) and late preterm (gestational weeks 34-36). STUDY DESIGN A total of 39 423 children and their mothers participated in the Norwegian Mother and Child Cohort Study. The sample included 7109 children (18%) born early term and 1673 (4.2%) born late preterm. ...

Journal: :Pediatrics 2012
Leïla Marcus Fleur Lejeune Frédérique Berne-Audéoud Edouard Gentaz Thierry Debillon

OBJECTIVE Recent studies have shown that from the postconceptional age of 33 weeks, preterm infants are able to memorize tactile information about the shape of an object by using their hands, and can detect differences with another shape. This study aimed to investigate tactile abilities earlier on in development, in very preterm and mildly preterm human infants. METHODS Infants were assigned...

2017
Harunor Rashid Miki Kagami Farzana Ferdous Enbo Ma Toru Terao Taiichi Hayashi Yukiko Wagatsuma

BACKGROUND Birth weight and length have seasonal fluctuations. However, it is uncertain which meteorological element has an effect on birth outcomes and which timing of pregnancy would explain such effect. Therefore, the purpose of this study was to examine temperature effects during pregnancy and which timing of pregnancy has effects on size at birth. METHODS A large, randomized, controlled ...

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