There is no link between newborn thyroid function within the normal range and cognitive development, scientists have claimed. The researchers have also said that they have not found any correlation between maternal thyroid function and newborn thyroid function in a Boston-area sample. While, normal thyroid function is vital for healthy brain development, it has been suggested in earlier studies that even mild maternal hypothyroidism during pregnancy may have adverse effect on child cognitive development. In the Project Viva, a team of researchers led by Dr. Emily Oken of Harvard Medical School and Harvard Pilgrim Health Care, studied 500 children born 1999-2003 to evaluate the relationship between thyroxine levels in newborns, first trimester maternal thyroid function, and childhood cognition. In the first place, scientists tested mothers' thyroid stimulating hormone, thyroxine, and thyroid peroxidase antibody levels at an average of 10.2 weeks gestation and later measured newborns' thyroxine levels from whole blood samples after birth. Later, they performed cognitive testing when the infants were six months old using the visual recognition memory test, a measure of infant cognition that can predict later childhood IQ and specific abilities in perceptual speed, language, and memory. At the age of three years, the children were tested with the Peabody Picture Vocabulary Test a measure of verbal ability or scholastic aptitude, and the Wide Range Assessment of Visual Motor Ability , which evaluates visual-spatial analysis, visual-motor ability, and fine motor skills. They found no correlation between newborn thyroxine levels and maternal thyroxine, TSH or TPO antibody levels. When they performed multivariable linear regression analysis, it was found that higher thyroxine was associated with slightly poorer scores on the VRM among infants at six months, but not with scores at age three on either the PPVT or the WRAVMA; maternal thyroid function was not found to be related to child cognitive test scores. "In this sample from an iodine sufficient area, first-trimester maternal thyroid function does not appear to affect a newborn's thyroid function at birth, nor does lower neonatal thyroid function within the normal range impact a child's cognition," said one of the co-authors of the study. He added: "These findings were unexpected. We look forward to the results of trials currently ongoing in the U.S. and Europe to better elucidate the relationship between mild maternal hypothyroidism and child cognition." The study will be presented at the 79th Annual Meeting of the American Thyroid Association (ATA) in Chicago, IL.Source: ANIRAS/SK << New Technique to Test Chromosomal Abnormality from Blood Sa... Dalai Lama to Undergo Medical Check Up in New Delhi >> Recommended Reading Hyperthyroidism Hyperthyroidism is a condition in which the thyroid gland makes excessive thyroid hormone. Grave's disease is the most common cause of hyperthyroidism. READ MORE Hypothyroidism Symptoms of hypothyroidism are often general, unspecific changes in the body. Lethargy, weight gain, stiffness and cramping of muscles are some of the symptoms of hypothyroidism. READ MORE Palpitations And Arrhythmias Palpitations are unpleasant sensation of one's own heartbeat. READ MORE Sub Clinical Hypothyroidism may Raise Death Risk A new research suggests that people with moderate subclinical hypothyroidism (SCH), a condition in which the thyroid is mildly underactive, are at an increased mortality risk. READ MORE Can Drugs Affect Thyroid Function? Some medications affect the normal function of thyroid gland leading to thyroid function disorders in the form of hypothyroidism or hyperthyroidism. Read Patient Information Leaflet of medications to be aware of such effects and conduct regular monitoring of thyroid function to avoid complications READ MORE Hashimoto´s Thyroiditis Hashimoto’s thyroiditis is an autoimmune disorder of the thyroid causing hypothyroidism. Synthetic hormone levothyroxine is an effective lifelong oral drug. READ MORE Hypothyroidism during Pregnancy Hypothyroidism is a health condition where the thyroid gland produces less thyroid hormone. Hypothyroidism during pregnancy can seriously impact the health of the mother and baby in the womb. READ MORE Iodine Deficiency Disorder To control IDD, the ‘National Goiter Control Program (NGCP)’ was launched which was later renamed as the ‘National Iodine Deficiency Disorder Control Program (NIDDCP)’. READ MORE Thyroid Cancer “Shaped like a butterfly she sits within the neck,” that’s what an anonymous poet wrote about the thyroid gland but it can become cancerous and spread to other parts. READ MORE Most Popular on Medindia Fongitar (Zinc Pyrithionone) Sanatogen Blood Pressure Calculator More News on: Iodine Deficiency DisorderHyperthyroidismHypothyroidismThyroidThyroid CancerHashimoto´s ThyroiditisHypothyroidism during PregnancyCan Drugs Affect Thyroid Function?