Use of video display terminals during pregnancy and the risk of spontaneous abortion, low birthweight, or intrauterine growth retardation

1990 ◽  
Vol 18 (6) ◽  
pp. 675-688 ◽  
Author(s):  
Gayle C. Windham ◽  
Laura Fenster ◽  
Shanna H. Swan ◽  
Raymond R. Neutra
1993 ◽  
Vol 5 (4) ◽  
pp. 203-212 ◽  
Author(s):  
Roger A Fay ◽  
David A Ellwood

Originally all low birthweight infants were considered to be premature. When prematurity was redefined in terms of gestational age (SGA) and not preterm. With the large scale collection of obstetric data the distributions of birthweight at different gestational ages were described and from these, infants who were SGA could be defined. SGA became synonymous with terms such as growth retardation, but it soon became appearent that the two were not necessarily interchangeable. Scott and Usher found that it was the degree of soft tissue wasting rather than birthweight that related to poor perinatal outcome. Miller and Hassanein stated that: “birthweight by itself is not a valid measure of fetal growth impairment”. They used Rorher’s Ponderal Index (weight (g) × 100/length (cm)) to diagnose the malnourished or excessively wasted infants with reduced soft tissue mass. Most studies of intrauterine growth retardation (IUGR) still use low birthweight for gestational age centile as their only definition of IUGR or only study infants who have a low birthweight. Altman and Hytten expressed disquiet about this definition and stated: “There is now an urgent need to establish true measures of fetal growth from which deviations indicating genuine growth retardation can be derived” and that “it is particularly important that some reliable measures of outcome should be established”. In large series of term deliveries published recently, two groups of IUGR infants with different growth patterens have been identified. These studies confirm that birthweight alone is inadequate to define the different types of IUGR. They established that low Ponderal Index (PI) is a measure of IUGR associated with an increased incidence of perinatal problems and that it is time to re-evaluate IUGR in terms of the different types of aberrant fetal growth.


1997 ◽  
Vol 11 (2) ◽  
pp. 140-151 ◽  
Author(s):  
Bernard Lessa Horta ◽  
Cesar Gomes Victora ◽  
Ana Maria Menezes ◽  
Ricardo Halpern ◽  
Fernando C. Barros

1993 ◽  
Vol 48 (7) ◽  
pp. 448-450
Author(s):  
James L. Mills ◽  
Lewis B. Holmes ◽  
Jerome H. Aarons ◽  
Joe Leigh Simpson ◽  
Zane A. Brown ◽  
...  

2012 ◽  
Vol 9 (1) ◽  
pp. 41-44 ◽  
Author(s):  
A Dongol ◽  
S Mool ◽  
P Tiwari

Background Threatened abortion is the most common complication in the first half of pregnancy. Most of these pregnancies continue to term with or without treatment. Spontaneous abortion occurs in less than 30% of these women. Threatened abortion had been shown to be associated with increased incidence of antepartum haemorrhage, preterm labour and intra uterine growth retardation. Objective This study was to asses the outcome of threatened abortion following treatment. Methods This prospective study was carried out in Dhulikhel Hospital - Kathmandu University Hospital from January 2009 till May 2010. Total 70 cases of threatened abortion were selected, managed with complete bed rest till 48 hrs of cessation of bleeding, folic acid supplementation, uterine sedative, and hormonal treatment till 28 weeks of gestation. Ultrasonogram was performed for diagnosis and to detect the presence of subchorionic hematoma. Patients were followed up until spontaneous abortion or up to delivery of the fetus. The measures used for the analysis were maternal age, parity, gestational age at the time of presentation, previous abortions, presence of subchorionic hematoma, complete abortion, continuation of pregnancy, antepartum hemorrhage, intrauterine growth retardation and intrauterine death of fetus. Results Out of 70 cases subchorionic haematoma was found in 30 (42.9%) cases. There were 12 (17.1%) patients who spontaneously aborted after diagnosis of threatened abortion during hospital stay, 5 (7.1%) aborted on subsequent visits while 53 (75.8%) continued pregnancy till term. Among those who continued pregnancy intrauterine growth retardation was seen in 7 (13.2%), antepartum hemorrhage in 4 (7.5%), preterm premature rupture of membrane in 3 (5.66%) and IUD in 3 (5.66%). Spontaneous abortion was found more in cases with subchorionic hematoma of size more than 20 cm2. Conclusion In cases of threatened abortion with or without the presence of subchorionic hematoma, prognostic outcome is better following treatment with bed rest, uterine sedatives, folic acid supplementation and hormonal treatment.http://dx.doi.org/10.3126/kumj.v9i1.6261 Kathmandu Univ Med J 2011;9(1):41-4


1993 ◽  
Vol 42 (3) ◽  
pp. 328-328
Author(s):  
J.L. Mills ◽  
L.B. Holmes ◽  
J.H. Aarons ◽  
J.L. Simpson ◽  
Z.A. Brown ◽  
...  

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