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Babies May Remember Words Heard Before Birth

Babies May Remember Words Heard Before Birth

08/26/13

MONDAY, Aug. 26 (HealthDay News) -- If you feel like talking to your fetus in the womb, a new study suggests you should: The research finds that babies develop a memory of words they hear frequently before they are born.

"We believe this shows how well the brain at this age adapts to sounds. It is a sign of very early language learning, or adaptation to the sounds they heard," said study co-author Minna Huotilainen, a docent at the University of Helsinki's Finnish Center of Excellence in Interdisciplinary Music Research. "A newborn baby is not an empty canvas, but has already learned how his or her mother and other family members speak."

It may sound amazing that babies can recall sounds they heard in the womb, especially considering their brains are still developing the connections that allow them to process anything at all. Still, there are signs that fetuses actually remember sounds they encounter.

"There is already some evidence that fetuses can learn, and that babies can remember songs or passages of speech from the fetal period," Huotilainen said.

The researchers tested the memory of Finnish fetuses by exposing them to a single word -- "tatata" -- that means nothing in the Finnish language.

"It is a so-called 'pseudoword' that is important for research. It has three syllables, and we chose such a long word to make it challenging for the small brains to find the changes and give them something difficult to learn," Huotilainen said. "Such a word could exist in Finnish. It follows all the rules of the Finnish language."

From the 29th week of pregnancy until birth, about half of the 33 pregnant women in the study listened to recordings of the word repeated hundreds of times. Sometimes the recordings presented the word with a different middle syllable ("to") or pronounced differently.

After birth, the researchers used scans to test the activity in the brains of all the babies when they heard the word. Those who'd heard it before "showed an enhanced reaction to this specific word," Huotilainen said. "They were able to process the word better, and also they were able to detect changes in the word better."

Huotilainen said it appears that the type of learning revealed by the study probably happens in the late part of pregnancy, although this hasn't been studied. Babies begin to hear about halfway through pregnancy, she said.

Patricia Kuhl, a speech researcher and director of the University of Washington's NSF Science of Learning Center, praised the study. "The fact that learning from frequently presented sounds occurs while infants are still in the womb means that language learning does not begin on Day 1 at the moment of birth, but while the infant listens to sounds in utero. It's really quite amazing that the fetal brain has that capacity."

What can parents do with this information?

"Be aware that the fetus can hear something from the outside world and learn from it," study co-author Huotilainen said. "Speak during your pregnancy. You can speak to other people or to your fetus if you like."

The study appears in this week's issue of the journal Proceedings of the National Academy of Sciences.

More information

For more about pregnancy, try the U.S. National Library of Medicine.

Copyright © 2013 HealthDay. All rights reserved.

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.

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