The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
Salim Daya - One of the best experts on this subject based on the ideXlab platform.
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Accuracy of Gestational Age estimation by means of fetal crown-rump length measurement.
American Journal of Obstetrics and Gynecology, 1993Co-Authors: Salim DayaAbstract:OBJECTIVE: The purpose of this study was to develop a Gestational Age table by means of crown-rump length measurements in the first trimester in pregnancies conceived through in vitro fertilization. STUDY DESIGN: Ninety-four infertile women with singleton intrauterine pregnancies resulting from in vitro fertilization underwent ultrasonographic examinations in the first trimester. The relationship between Gestational Age (calculated with the day of oocyte retrieval used as day 14) and the crown-rump length was explored with regression analysis. RESULTS: A quadratic model demonstrated the best fit to the data, indicating a curvilinear relationship between crown-rump length and Gestational Age. Estimates of Gestational Age with crown-rump length measurements between 40 and 60 mm were observed to be similar to published tables, but outside this range the tables either overestimate or underestimate the true Gestational Age. CONCLUSION: A more accurate equation for Gestational Age estimation with crown-rump length measurements in early pregnancy has been developed with in vitro fertilization pregnancy data.
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Accuracy of Gestational Age estimation by means of fetal crown-rump length measurement.
American journal of obstetrics and gynecology, 1993Co-Authors: Salim DayaAbstract:The purpose of this study was to develop a Gestational Age table by means of crown-rump length measurements in the first trimester in pregnancies conceived through in vitro fertilization. Ninety-four infertile women with singleton intrauterine pregnancies resulting from in vitro fertilization underwent ultrasonographic examinations in the first trimester. The relationship between Gestational Age (calculated with the day of oocyte retrieval used as day 14) and the crown-rump length was explored with regression analysis. A quadratic model demonstrated the best fit to the data, indicating a curvilinear relationship between crown-rump length and Gestational Age. Estimates of Gestational Age with crown-rump length measurements between 40 and 60 mm were observed to be similar to published tables, but outside this range the tables either overestimate or underestimate the true Gestational Age. A more accurate equation for Gestational Age estimation with crown-rump length measurements in early pregnancy has been developed with in vitro fertilization pregnancy data.
Jørn Olsen - One of the best experts on this subject based on the ideXlab platform.
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Gestational Age, small for Gestational Age, and infantile colic.
Paediatric and perinatal epidemiology, 2013Co-Authors: Ioanna Milidou, Charlotte Søndergaard, Morten Søndergaard Jensen, Jørn Olsen, Tine Brink HenriksenAbstract:Background Preterm and growth restricted infants may have developmental delays and deviations from normal organ function related to the gastrointestinal tract and the central nervous system. Since both organ systems are hypothesised to be involved in the pathogenesis of infantile colic, a condition characterised by excessive crying during the first months of life, impaired fetal growth and preterm birth may be risk factors for infantile colic. Methods A total of 62 761 liveborn singletons from the Danish National Birth Cohort (1996 to 2002) were studied. Infantile colic was defined according to Wessel's modified criteria based on maternal interview conducted at 6 months post-partum. Results A total of 2605 (4.2%) infants were born preterm, 54 441 (86.7%) at term, and 5715 (9.1%) post-term. A total of 4964 (7.9%) infants fulfilled Wessel's modified criteria for infantile colic. The risk for infantile colic increased with decreasing Gestational Age after adjustment for covariates. The highest odds [odds ratio (95% confidence interval)] was observed for infants born before 32 completed Gestational weeks (1.5 [95% CI 1.0, 2.2], reference: 40 Gestational weeks). Small for Gestational Age infants (birthweight below 10th percentile) had an increased odds of infantile colic (1.2 [95% CI 1.1, 1.3]) in all Gestational Age groups. Conclusions We observed an increased risk of infantile colic in preterm and small for Gestational Age infants in a large cohort. Our results suggest that the aetiology of infantile colic may be found in the prenatal, perinatal, and neonatal period.
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Correlation between self‐reported Gestational Age and ultrasound measurements
Acta obstetricia et gynecologica Scandinavica, 2004Co-Authors: Annette Wind Olesen, S Ten Grove Thomsen, Jes G. Westergaard, Jørn OlsenAbstract:Background. We studied the agreement between different measurements of Gestational Age, i.e. self-reported Gestational Age in the Danish National Birth Cohort Study, ultrasound-estimated Gestational Age from the medical records in one Danish county and Gestational Age from the Danish National Hospital Discharge Register. Methods. The ultrasound-estimated Gestational length was based on the size of the biparietal diameter. The ultrasound-estimated Gestational length was related to corrected and uncorrected last menstrual period estimates in the Danish National Cohort Study, and to the Gestational length recorded in the Danish National Discharge Register. Non-parametric statistics were used in the analysis. Results. The Gestational Ages estimated by ultrasound were 2-3 days shorter than Gestational Ages estimated by the other methods. The Gestational Ages recorded by the Discharge Register and the Gestational Ages based on corrected last menstrual period did not differ significantly. Conclusion. The self-re...
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Correlation between self-reported Gestational Age and ultrasound
2004Co-Authors: Wind Olesen, J Es Grabow Westergaard, S Ten Grove Thomsen, Jørn OlsenAbstract:Acta Obstet Gynecol Scand 83 2004Background. We studied the agreement between different measurements of GestationalAge, i.e. self-reported Gestational Age in the Danish National Birth Cohort Study,ultrasound-estimated Gestational Age from the medical records in one Danish countyand Gestational Age from the Danish National Hospital Discharge Register.Methods. The ultrasound-estimated Gestational length was based on the size of thebiparietal diameter. The ultrasound-estimated Gestational length was related to correctedand uncorrected last menstrual period estimates in the Danish National Cohort Study,and to the Gestational length recorded in the Danish National Discharge Register.Non-parametric statistics were used in the analysis.Results. The Gestational Ages estimated by ultrasound were 2–3days shorter than gesta-tional Ages estimated by the other methods. The Gestational Ages recorded by theDischarge Register and the Gestational Ages based on corrected last menstrual perioddid not differ significantly.Conclusion. The self-reported Gestational Age in The Danish National Birth Cohort is ingood concordance both with data from the National Hospital Discharge Register andwith ultrasound-estimated Gestational Age.Key words: biparietal diameter; Danish National Birth Cohort; Gestational Age; last men-strual periodSubmitted 4 February, 2003Accepted 13 February, 2003
Anna-liisa Järvenpää - One of the best experts on this subject based on the ideXlab platform.
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Original Research Article: Do Gestational Age and Weight for Gestational Age Predict Concordance in Parental Perceptions of Infant Temperament?
2006Co-Authors: Anu-katriina Pesonen, Timo Strandberg, Anna-liisa JärvenpääAbstract:Objective To study whether infant weight for Gestational Age, and Gestational Age predict mother- and father-rated infant temperament (IBQ) at 6 months. Methods The sample comprised of family units with both biological parents and infants born at term (n = 152). Data on weight and Gestational Age were collected form obstetric database. Results Infants born small for Gestational Age (SGA) (weight < 10th percentile for Gestational Age) were rated by both parents as significantly more fearful and negatively reactive compared to infants born appropriate for Gestational Age (AGA). Infants born SGA defined by using the lowest 15th or 20th percentile groups did not differ from AGA group in temperament. The weekly continuum of Gestational Age predicted differences in parental ratings of infant temperamental attentiveness. Conclusions The predictive significance of infant weight for Gestational Age and Gestational Age for behavioral outcomes appear true also for infants born at term. Concordance in parental perceptions of an infant born SGA emphasizes the clinical significance of the findings.
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Do Gestational Age and Weight for Gestational Age Predict Concordance in Parental Perceptions of Infant Temperament
Journal of pediatric psychology, 2005Co-Authors: Anu-katriina Pesonen, Katri Räikkönen, Timo E. Strandberg, Anna-liisa JärvenpääAbstract:Objective To study whether infant weight for Gestational Age, and Gestational Age predict mother- and father-rated infant temperament (IBQ) at 6 months. Methods The sample comprised of family units with both biological parents and infants born at term (n = 152). Data on weight and Gestational Age were collected form obstetric database. Results Infants born small for Gestational Age (SGA) (weight < 10th percentile for Gestational Age) were rated by both parents as significantly more fearful and negatively reactive compared to infants born appropriate for Gestational Age (AGA). Infants born SGA defined by using the lowest 15th or 20th percentile groups did not differ from AGA group in temperament. The weekly continuum of Gestational Age predicted differences in parental ratings of infant temperamental attentiveness. Conclusions The predictive significance of infant weight for Gestational Age and Gestational Age for behavioral outcomes appear true also for infants born at term. Concordance in parental perceptions of an infant born SGA emphasizes the clinical significance of the findings.
Sven Cnattingius - One of the best experts on this subject based on the ideXlab platform.
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Risk of intellectual disability in children born appropriate-for-Gestational-Age at term or post-term: impact of birth weight for Gestational Age and Gestational Age.
European journal of epidemiology, 2019Co-Authors: Ruoqing Chen, Kristina Tedroff, Eduardo Villamor, Sven CnattingiusAbstract:Children born small for Gestational Age have a higher risk of intellectual disability. We investigated associations of birth weight for Gestational Age percentile and Gestational Age with risk of intellectual disability in appropriate-for-Gestational-Age (AGA) children. We included 828,948 non-malformed term or post-term AGA singleton children (including 429,379 full siblings) born between 1998 and 2009 based on data from the Swedish Medical Birth Register. Diagnosis of intellectual disability after 3 years of Age was identified through the Patient Register. Using Cox regression models, we calculated hazard ratios (HRs) with 95% confidence intervals (CIs) of intellectual disability among children with different birth weight percentiles and Gestational Age in the whole population and in a subpopulation of full siblings. A total of 1688 children were diagnosed with intellectual disability during follow-up. HRs (95% CIs) of intellectual disability for the low birth weight percentile groups (10th-24th and 25th-39th percentiles, respectively) versus the reference group (40th-59th percentiles) were 1.43 (1.22-1.67) and 1.28 (1.10-1.50) in population analysis and 1.52 (1.00-2.31) and 1.44 (1.00-2.09) in sibling comparison analysis. The increased risk for low birth weight percentiles in population analysis was stable irrespective of Gestational Age. A weak U-shaped association between Gestational Age and intellectual disability was observed in population analysis, although not in sibling comparison analysis. These findings suggest that among AGA children born at term or post-term, lower birth weight percentiles within the normal range are associated with increased risk of intellectual disability, regardless of Gestational Age.
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Risks for low intellectual performance related to being born small for Gestational Age are modified by Gestational Age.
Pediatrics, 2006Co-Authors: N Bergvall, S Johansson, Torsten Tuvemo, Anastasia Iliadou, Sven CnattingiusAbstract:We sought to study whether the association between being born small for Gestational Age and risk for low intellectual performance was modified by Gestational Age. A population-based cohort study was conducted of 352,125 boys who were born between 28 and 43 completed weeks of gestation from 1973 to 1981 in Sweden. Risk for low intellectual performance at military conscription, estimated as odds ratios with 95% confidence intervals was measured. Compared with men who were born preterm (28-36 weeks) and had normal birth weight for Gestational Age, men who were born preterm and had a very low birth weight for Gestational Age were not at increased risk for low intellectual performance. In contrast, men who were born preterm with a very short birth length or a very small head circumference for Gestational Age faced a near doubled risk for low intellectual performance compared with their appropriate peers. Among men who were born at term (37-41 weeks), risk for low intellectual performance was increased among those with very or moderately small birth weight, birth length, or head circumference for Gestational Age. During early stAges of gestation, growth in length and head circumference may be more important for intellectual development than weight increase. Future studies on size at birth and intellectual performance should consider also including anthropometric measurements other than birth weight.
Robert W. Platt - One of the best experts on this subject based on the ideXlab platform.
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The effect of Gestational Age errors and their correction in interpreting population trends in fetal growth and Gestational Age-specific mortality.
Seminars in perinatology, 2002Co-Authors: Robert W. PlattAbstract:In perinatal research and clinical practice, Gestational Age is a crucial variable for measuring fetal "growth" (birth weight for Gestational Age) and for estimating the risk of mortality and morbidity. Yet, reported Gestational Age values are affected by random and systematic errors. This article reviews methods for detecting and correcting errors in Gestational Age and compares the effects of these methods on fetal growth standards and on the use of population-based data in analysis of trends in Gestational-Age specific infant mortality.
