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Related Experiment Videos

Fetal yawning

W Sepulveda1, M Mangiamarchi

  • 1Centre for Fetal Care, Royal Postgraduate Medical School, Queen Charlotte's and Chelsea Hospital, London, UK.

Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology
|January 1, 1995
PubMed
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Fetal yawning, a complex reflex, can be observed via ultrasound in the second half of pregnancy. This study documents repetitive yawning in a 27-week fetus, showing its presence and extent during prenatal development.

Area of Science:

  • Obstetrics and Gynecology
  • Fetal Medicine
  • Developmental Biology

Background:

  • Fetal behavioral analysis via ultrasonography offers insights into prenatal development.
  • Yawning is a complex, involuntary reflex observed in neonates and adults.
  • Limited data exists on the presence and characteristics of fetal yawning in utero.

Observation:

  • Repetitive fetal yawning movements were documented in a 27-week gestation fetus.
  • Observations were made during a 7-minute real-time ultrasonographic examination.
  • Each yawning episode lasted 4-6 seconds with variable intervals (21-195 seconds).

Findings:

  • Fetal yawning is a demonstrable behavior during the second half of pregnancy.
  • The observed yawning exhibited characteristics of a complex, involuntary reflex.

Related Experiment Videos

  • This case confirms the presence of fetal yawning well before birth.

    • Implications:

    • Ultrasonographic observation of fetal yawning can serve as a potential indicator of fetal well-being.
    • Further research into fetal yawning may elucidate its role in neurodevelopment.
    • Understanding fetal behavioral repertoire enhances prenatal assessment and care.