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Study suggests link between longer duration of breastfeeding and increased intelligence.(Brief Article)
2002 MAY 30 - (NewsRx.com & NewsRx.net) -- How long a baby is breastfed may be associated with the child's intelligence level later in life, according to an article in the May 8, 2002, issue of the Journal of the American Medical Association.
Erik Lykke Mortensen, PhD, of the Danish Epidemiology Science Center, Copenhagen University Hospital, Denmark, and June Machover Reinisch, PhD, of the Kinsey Institute for Research in Sex, Gender and Reproduction, Indiana University, Bloomington, and colleagues examined the relationship between duration of breastfeeding and intelligence in young adults.
According to background information in the article, a number of studies suggest a positive association between breastfeeding and cognitive development in early and middle childhood. However, other studies of correlations between childhood and adult intelligence show that intelligence is quite unstable during the first decade of life, and thus, it is possible that children who were exclusively or primarily bottle-fed may catch up and attain the same intelligence level of children who were breastfed.
Mortensen and colleagues evaluated a sample of 973 men and women and a sample of 2280 men, all of whom are among the 9125 participants in the Copenhagen Perinatal Cohort, which is made up of individuals born between October 1959 and December 1961. The samples were divided into five categories based on duration of breastfeeding. The participants' intelligence was measured by two methods - the Wechsler Adult Intelligence Scale (WAIS), used on the mixed-sex sample at a mean age of 27.2 years, and the Borge Priens Prove (BPP) test, used on the all male sample at a mean age of 18.7 years.
A number of other factors also were included because of the potential effect they could have on the results, such as parental social status and education; single mother status; mother's age, and weight gain during pregnancy and cigarette consumption during the third trimester; number of pregnancies and delivery complications.
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Source: HighBeam Research, Study suggests link between longer duration of breastfeeding and...