Well­ness Arti­cles

Asso­ci­a­tion Between Dura­tion of Breast­feed­ing and Adult Intel­li­gence

From the May 8, 2002 issue of The Jour­nal of the Amer­i­can Med­ical Asso­ci­a­tion ( JAMA) reports a study that sug­gests that the longer an infant breast feeds, the more likely their intel­li­gence level will be higher when they become an adult. Accord­ing to the study the results showed that the dura­tion of breast­feed­ing was asso­ci­ated with sig­nif­i­cantly higher scores on the Ver­bal, Per­for­mance, and Full Scale IQs testing.

The study was con­ducted in a sam­ple of 3253 men and women, all of whom were born in Copen­hagen, Den­mark, between Octo­ber 1959 and Decem­ber 1961. The sub­jects were divided into 5 cat­e­gories based on dura­tion of breast­feed­ing, as assessed by physi­cian inter­view with moth­ers at a 1-​year exam­i­na­tion. The aver­age results showed that for infants that breast fed for less than 1 month the aver­age adult IQ at age 27 was 99.4. Con­versely infants that breast fed for more than 9 months showed an aver­age IQ at age 27 of 104.0. Infants in between the breast fed dura­tions of less than one month and more than 9 months showed IQs that were between 99.4 and 104.0.

This data con­vinced researchers of a direct cor­re­la­tion between length of time that an infant breast feeds and the prob­a­ble adult IQ rate later in life. The researchers con­cluded, “Inde­pen­dent of a wide range of pos­si­ble con­found­ing fac­tors, a sig­nif­i­cant pos­i­tive asso­ci­a­tion between dura­tion of breast­feed­ing and intel­li­gence was observed in 2 inde­pen­dent sam­ples of young adults, assessed with 2 dif­fer­ent intel­li­gence tests.”

Ran­dom Article

A study pub­lished in the July /​August 2004 peer-​reviewed sci­en­tific jour­nal, “Jour­nal of Manip­u­la­tive and Phys­i­o­log­i­cal Ther­a­peu­tics”, com­pared the effects of

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