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Development of ingestive behavior

M G Ross1, M J Nijland

  • 1Department of Obstetrics and Gynecology, University of California Los Angeles, School of Medicine, Harbor-University of California Los Angeles Medical Center, Torrance 90502, USA.

The American Journal of Physiology
|May 12, 1998
PubMed
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Fetal swallowing develops in utero, crucial for regulating amniotic fluid and gastrointestinal maturation. This ingestive behavior is influenced by fetal development and dipsogenic mechanisms, impacting fluid homeostasis.

Area of Science:

  • Physiology
  • Developmental Biology
  • Fetal Medicine

Background:

  • Swallowing is vital for nutrient intake and survival.
  • In precocial species, swallowing develops prenatally for neonatal function.
  • Understanding in utero swallowing is key to fetal development.

Purpose of the Study:

  • To review current knowledge on in utero swallowing development.
  • To highlight the importance of fetal ingestive behavior.
  • To explore regulatory mechanisms of fetal swallowing.

Main Methods:

  • Utilized chronically instrumented ovine fetal preparations.
  • Analyzed spontaneous in utero swallowing activity.
  • Examined influences on fetal ingestive behavior.

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Main Results:

  • Near-term ovine fetuses swallow significantly more fluid per body weight than adults.
  • Fetal swallowing regulates amniotic fluid volume, composition, and solute exchange.
  • Fetal swallowing is influenced by maturation, neurobehavioral state, and amniotic fluid volume.
  • Dipsogenic mechanisms like osmolality and angiotensin II are functional in fetuses.

Conclusions:

  • In utero ingestive behavior is critical for fetal development and fluid balance.
  • Regulatory mechanisms for swallowing develop during fetal life.
  • Fetal swallowing may impact long-term fluid homeostasis.
  • Further research is needed on nutrient/salt appetite and taste influences.