Birth - Macrosomia: Difference between revisions

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Macrosomia (large gestational age, LGA) is a term used to describe a newborn with an excessive birth weight. The definition is either a birth weight of 4000 to 4500 g (8 lb 13 oz to 9 lb 15 oz) or greater than 90% for gestational age after correcting for neonatal sex and ethnicity. There are a range of overgrowth syndromes associated with developmental delay, tumors, and other anomalies with genetic causes and syndromes (Pallister-Killian, Beckwith-Wiedemann, Sotos, Perlman, and Simpson-Golabi-Behmel) rarely diagnosed prenatally.
Macrosomia (large gestational age, LGA) is a term used to describe a newborn with an excessive birth weight. The definition is either a birth weight of 4000 to 4500 g (8 lb 13 oz to 9 lb 15 oz) or greater than 90% for gestational age after correcting for neonatal sex and ethnicity. There are a range of overgrowth syndromes associated with developmental delay, tumors, and other anomalies with genetic causes and syndromes (Pallister-Killian, Beckwith-Wiedemann, Sotos, Perlman, and Simpson-Golabi-Behmel) rarely diagnosed prenatally.


Currently there is clinical research looking into the best formula based upon ultrasound analysis
Currently there is clinical research looking into the best mathematical formula based upon ultrasound measurements to estimate the possibility of macrosomia occurring.





Revision as of 12:34, 26 February 2012

Introduction

Historic model of birth

Macrosomia (large gestational age, LGA) is a term used to describe a newborn with an excessive birth weight. The definition is either a birth weight of 4000 to 4500 g (8 lb 13 oz to 9 lb 15 oz) or greater than 90% for gestational age after correcting for neonatal sex and ethnicity. There are a range of overgrowth syndromes associated with developmental delay, tumors, and other anomalies with genetic causes and syndromes (Pallister-Killian, Beckwith-Wiedemann, Sotos, Perlman, and Simpson-Golabi-Behmel) rarely diagnosed prenatally.

Currently there is clinical research looking into the best mathematical formula based upon ultrasound measurements to estimate the possibility of macrosomia occurring.


Birth Links: birth | Lecture - Birth | caesarean | preterm birth | birth weight | macrosomia | Birth Statistics | Australian Birth Data | Developmental Origins of Health and Disease (DOHAD) | Neonatal Diagnosis | Apgar test | Guthrie test | neonatal | stillbirth and perinatal death | ICD-10 Perinatal Period | Category:Birth
Historic Birth links  
1921 USA Birth Mortality

| Maternal Diabetes

Some Recent Findings

  • Maternal serum adiponectin at 11 to 13 weeks of gestation in the prediction of macrosomia[1] "Maternal serum adiponectin concentration was measured in a case-control study of singleton pregnancies at 11 to 13 weeks' gestation, which included 50 cases that subsequently delivered macrosomic neonates with birth weight above the 95th percentile for gestation at delivery and 300 controls who delivered appropriate for gestational age neonates. In the macrosomic group the median serum adiponectin [0.82, interquartile range (IQR): 0.56-1.02 MoM] was significantly lower than in the non-macrosomic controls (1.02, IQR: 0.70-1.29 MoM; p = 0.001). The estimated detection rate of macrosomia, at fixed false positive rate of 10%, from maternal characteristics and obstetric history was 34.6% and this increased to 38.2% with the addition of serum adiponectin. Maternal serum adiponectin at 11 to 13 weeks is a useful biomarker for early prediction of macrosomia."
  • Genetic considerations in the prenatal diagnosis of overgrowth syndromes[2] "Large (>90%) for gestational age (LGA) fetuses are usually identified incidentally. Detection of the LGA fetus should first prompt the provider to rule out incorrect dates and maternal diabetes. Once this is done, consideration should be given to certain overgrowth syndromes, especially if anomalies are present. The overgrowth syndromes have significant clinical and molecular overlap, and are associated with developmental delay, tumors, and other anomalies. Although genetic causes of overgrowth are considered postnatally, they are infrequently diagnosed prenatally. Here, we review prenatal sonographic findings in fetal overgrowth syndromes, including Pallister-Killian, Beckwith-Wiedemann, Sotos, Perlman, and Simpson-Golabi-Behmel. We also discuss prenatal diagnosis options and recurrence risks."

References

  1. <pubmed>21394735</pubmed>
  2. <pubmed>19609940</pubmed>

Reviews

Articles

<pubmed>18598122</pubmed>

Search Pubmed

Search Pubmed: Macrosomia | high birth weight


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