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Fetus Heart Races When Mom Reads Poetry; New Findings Reveal Fetuses Recognize Mother’s Voice In-utero

Date:
May 13, 2003
Source:
Queen's University
Summary:
New research findings on the ability of a fetus to recognize its mother's voice and even distinguish it from other female voices confirms what scientists have speculated about for more than 20 years - that experiences in the womb help shape newborn preferences and behaviour.

Kingston, Ont. -- New research findings on the ability of a fetus to recognize its mother's voice and even distinguish it from other female voices confirms what scientists have speculated about for more than 20 years - that experiences in the womb help shape newborn preferences and behaviour.

Dr. Barbara Kisilevsky, a Queen's University professor of nursing along with a team of psychologists at Queen's and obstetricians in Hangzhou, China, found that fetuses are capable of learning in the womb and can remember and recognize their mother's voice before they are even born. Their research findings are published in the current issue of the international journal Psychological Science.

While previous research on infant development has demonstrated that newborns prefer to listen to their own mother's voice to that of a female stranger and will even change their behaviour to elicit their mother's voice, Dr. Kisilevsky's research proves that this "preference/recognition" begins before birth.

"This is an extremely exciting finding that provides evidence of sustained attention, memory and learning by the fetus," says Dr Kisilevsky. "The fetuses learn about their mother's voice in the womb and then prefer it after birth. Our findings provide evidence that in-utero experience has an impact on newborn/infant behaviour and development and that voice recognition may play a role in mother-infant attachment."

The findings also suggest that the foundation for speech perception and language acquisition are laid before birth, says Dr. Kisilevsky. Therefore, the precocious language processing abilities observed in newborns and young infants may not be due to a hardwired speech-processing module in the brain as has been assumed, but instead stems from the interaction of the fetus with its environment.

Along with researchers at Zhejiang University, China, Dr. Kisilevsky tested 60 fetuses at term. Thirty fetuses were played a two-minute audiotape of their own mother reading a poem and 30 fetuses were played the voice of a female stranger reading the poem. The researchers found that the fetuses responded to their own mother's voice with heart-rate acceleration and to the stranger's voice with a heart-rate deceleration. The responses lasted during the two-minute tape as well as for at least two minutes after the offset of the voices.

"These results tell us that the fetuses heard and responded to both voices and that there was sustained attention to both voices," notes Dr. Kisilevsky. "But, because they responded differently to the two voices, we know they had to recognize their own mother's voice. We believe they are probably already learning about language in general and their own language specifically."

Dr. Kisilevsky's team is now investigating both fetal response to the father's voice and the ability of the fetus to differentiate between English and Mandarin. In 2000, Dr. Kisilevsky's research team proved that fetuses hear by the third trimester of pregnancy.


Story Source:

The above story is based on materials provided by Queen's University. Note: Materials may be edited for content and length.


Cite This Page:

Queen's University. "Fetus Heart Races When Mom Reads Poetry; New Findings Reveal Fetuses Recognize Mother’s Voice In-utero." ScienceDaily. ScienceDaily, 13 May 2003. <www.sciencedaily.com/releases/2003/05/030513080440.htm>.
Queen's University. (2003, May 13). Fetus Heart Races When Mom Reads Poetry; New Findings Reveal Fetuses Recognize Mother’s Voice In-utero. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2003/05/030513080440.htm
Queen's University. "Fetus Heart Races When Mom Reads Poetry; New Findings Reveal Fetuses Recognize Mother’s Voice In-utero." ScienceDaily. www.sciencedaily.com/releases/2003/05/030513080440.htm (accessed October 21, 2014).

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