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Related Experiment Videos

Fetal hearing.

D Querleu1, X Renard, F Versyp

  • 1Clinique Universitaire de Gynécologie et Obstetrique, Université de Lille II, Roubaix, France.

European Journal of Obstetrics, Gynecology, and Reproductive Biology
|July 1, 1988
PubMed
Summary
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Fetal hearing develops in the third trimester, with fetuses responding to sounds from 28 weeks. While some sound is lost, intonation is preserved, suggesting early auditory learning and memory.

Area of Science:

  • Fetal development
  • Auditory perception
  • Neuroscience

Background:

  • Fetal auditory development is a critical area of research.
  • Understanding fetal sensory experiences provides insights into early brain development.

Purpose of the Study:

  • To investigate the extent of fetal hearing during the third trimester.
  • To determine the transmission of external sounds to the fetus.
  • To explore evidence for fetal auditory learning and memory.

Main Methods:

  • Review of animal experiments and human investigations on fetal auditory responses.
  • Analysis of sound attenuation from external sources to the amniotic sac.
  • Assessment of phonetic and intonation transmission to the fetus.

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Main Results:

  • Consistent fetal responses to acoustic stimuli observed from 28 weeks gestation.
  • External sounds are attenuated by less than 30 decibels; conversations are audible.
  • Phonetic information transmission is limited (30%), but intonation is well-preserved.
  • Evidence suggests fetuses learn the mother's voice and sound patterns.

Conclusions:

  • Fetuses possess auditory capabilities in the third trimester.
  • Auditory learning and potential short-term memory may be present before birth.