Document Detail

Ontogeny of gastric emptying patterns in the human fetus.
MedLine Citation:
PMID:  16147826     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Fetal swallowing and gastric emptying contribute importantly to amniotic fluid (AF) homeostasis and fetal gastrointestinal development. We speculated that fetal gastric emptying must be functional early in gestation to prevent rapid increases in AF. We sought to determine the human fetal ontogenic pattern of gastric emptying. STUDY DESIGN: Gastric emptying of eighty normal fetuses at 12-39 weeks was studied. Real-time ultrasound of the fetal stomach was continuously recorded for 1 hour. The gastric area ratio (GAR) was defined as the gastric area divided by the abdominal transverse area. The delta GAR was defined as the change between the maximum and the minimum gastric area ratiox100 (expressed as percent). A change of the fetal gastric area more than the 10th percentile of the delta GAR at 36-39 weeks was used to define gastric emptying. RESULTS: The 10th, 50th and 90th percentile of delta GAR at 36-39 weeks' was 5.2, 6.5 and 8.7%, respectively. Fetal gastric emptying was detected as early as 12 5/7 weeks of gestation. The proportion of fetuses demonstrating gastric emptying (>10th percentile delta GAR) increased with gestational age: 4/33 (12.1%) 12-23 weeks, 3/9 (33.3%) at 24-27 weeks, 8/11 (72.7%) at 28-31 weeks, 12/14 (85.7%) at 32-35 weeks, and 11/13 (84.6%) at 36-39 weeks. CONCLUSIONS: Fetal gastric emptying occurs by the beginning of the second trimester, contributing to AF regulation. The increased frequency of gastric emptying in late gestation is likely secondary to increased swallowing, altered fetal behavioral state or endogenous production of gastrointestinal motility factors.
Masakatsu Sase; Ichiro Miwa; Masahiro Sumie; Masahiko Nakata; Norihiro Sugino; Michael G Ross
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians     Volume:  17     ISSN:  1476-7058     ISO Abbreviation:  J. Matern. Fetal. Neonatal. Med.     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-09-08     Completed Date:  2005-12-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101136916     Medline TA:  J Matern Fetal Neonatal Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  213-7     Citation Subset:  IM    
Division of Medicine for Maternal and Child Health, Department of Reproductive, Pediatric and Infection Science, Yamaguchi University School of Medicine, Yamaguchi, Japan.
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MeSH Terms
Cross-Sectional Studies
Fetus / physiology*
Gastric Emptying / physiology*
Gestational Age
Ultrasonography, Prenatal

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