Gestational Size While Pregnant May Affect Childhood IQ, Study Finds


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A study performed in the UK found that babies that were designated as small for gestational age during pregnancy had slightly lower IQs during childhood. The gap in IQ seemed to close as these babies approached adulthood. Small for gestational age is a designation given to a fetus that’s in the 10th percentile or lower.

The adjusted mean differences in verbal IQ from children born large for gestational age were −2.4 (95% CI: −3.5, −1.2) among those born small for gestational age, −1.7 (95% CI: −2.6, −0.8) among the 10th–50th percentile, and −0.8 (95% CI: −1.7, 0.1) among the >50th–90th percentile. “There was an increase in IQ from 37 to 40 weeks. The IQ score was highest at 40 weeks of gestational age,” said Dr. Yang, who works at the Research Institute of Montreal Children. Among boys, the study found, maternal overweight and obesity correlated with IQ scores between 4.6 and almost 9 points lower than those of boys whose mothers weights were in the “normal” range.

Gestational Size During Pregnancy May Affect Childhood IQ, Study Finds Fact checked by Sean Blackburn Sharp Decline in Immunization Rates Warrants Cause for Concern. Compared to children who were appropriate for gestational age (AGA), children who were large for gestational age (LGA) at birth had a 1.66 times (95%CI 1.32–2.10) higher odds of ALL. Similarly, children with a BW≥ 4,000 grams had a 1.5 times (95%CI 1.18–1.89) higher odds for ALL, compared to children who weighed >2,500 grams and <4,000 grams at birth.

A study suggests that treatment with interferon-beta MS therapy during pregnancy does not influence children’s gestational age, birth weight, or head size. Study Finds Potential Link Between Gestational Diabetes and Autism Researchers examined the records of 320,000 children to determine if there’s a. The study looked at data from nearly 700 Edmonton children, and controlled for factors that would affect a child’s development, including family income, parents’ education and gestational.

MRI brain image may help predict intelligence level in children MRI is a common technique used to obtain images of human internal organs and tissues.

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However, this Dutch study is discussed later in this section because it was based on a very large population and did not find intrauterine growth reduction was correlated with adult IQ.

“Human Body Size and the Laws of Scaling: Physiological, Performance, Growth, Longevity and Ecological Ramifications” by Thomas T. Samaras, Andrzej Bartke, Christopher David Rollo
from Human Body Size and the Laws of Scaling: Physiological, Performance, Growth, Longevity and Ecological Ramifications
by Thomas T. Samaras, Andrzej Bartke, Christopher David Rollo
Nova Science Publishers, 2007

Cognitive scores at school age remain significantly correlated with gestational age and birth weight [37, 111, 112, 116].

“Neonatology: A Practical Approach to Neonatal Diseases” by Giuseppe Buonocore, Rodolfo Bracci, Michael Weindling
from Neonatology: A Practical Approach to Neonatal Diseases
by Giuseppe Buonocore, Rodolfo Bracci, Michael Weindling
Springer Milan, 2012

Although populations of children born before term demonstrate a normal range of IQ scores, the mean IQ score decreases with decreasing birth weight and gestational age categories.

“Developmental-Behavioral Pediatrics E-Book” by William B. Carey, Allen C. Crocker, Ellen Roy Elias, Heidi M. Feldman, William L. Coleman
from Developmental-Behavioral Pediatrics E-Book
by William B. Carey, Allen C. Crocker, et. al.
Elsevier Health Sciences, 2009

The results obtained by Der et al. (2006) indicated that young adults who had been breastfed as infants scored about 4 IQ points (more than one-quarter of a standard deviation) higher than did young adults who had not been breastfed as children.

“Individual Differences and Personality” by Michael C. Ashton
from Individual Differences and Personality
by Michael C. Ashton
Elsevier Science, 2013

There is evidence that IQ in middle childhood is strongly predictive of IQ at adolescence, suggesting that, on this measure, there is neither increasing gap nor improved catch-up to normal birth weight peers.

“Handbook of Life Course Health Development” by Neal Halfon, Christopher B. Forrest, Richard M. Lerner, Elaine M. Faustman
from Handbook of Life Course Health Development
by Neal Halfon, Christopher B. Forrest, et. al.
Springer International Publishing, 2017

Studies published after the 1999 review continued to be somewhat methodologically uneven, but in general, research on stress and preterm birth has improved substantially since 1996 or 1997 in terms of the hypotheses and conceptualizations used, the measures used, sample sizes, and data analyses.

“Preterm Birth: Causes, Consequences, and Prevention” by Institute of Medicine, Board on Health Sciences Policy, Committee on Understanding Premature Birth and Assuring Healthy Outcomes, Adrienne Stith Butler, Richard E. Behrman
from Preterm Birth: Causes, Consequences, and Prevention
by Institute of Medicine, Board on Health Sciences Policy, et. al.
National Academies Press, 2007

However, the correlations between the biological mother’s level of education and adoptee’s IQ scores were.04 at age two and.31 at age thirteen, reflecting what was to be a typical finding in later studies: measures of genetic influences upon intelligence rise as children grow older.

“Human Intelligence” by Earl Hunt
from Human Intelligence
by Earl Hunt
Cambridge University Press, 2010

Previous studies had already found that drinking or smoking during pregnancy can cause decreased IQ in children, as can exposure to lead in the womb.

“The Biology of Belief 10th Anniversary Edition” by Bruce H. Lipton, Ph.D.
from The Biology of Belief 10th Anniversary Edition
by Bruce H. Lipton, Ph.D.
Hay House, 2015

In the Bavarian Longitudinal Study there was no relationship between gestational age and IQ at 33 weeks’ gestation or more, but there was a progressive reduction in scores for each week from 32 to 27 weeks (Wolke et al.

“Rennie & Roberton's Textbook of Neonatology E-Book” by Janet M. Rennie
from Rennie & Roberton’s Textbook of Neonatology E-Book
by Janet M. Rennie
Elsevier Health Sciences, 2012

It is a plausible hypothesis, then, that later IQ is particularly sensitive to nutritional substrates just before or just after birth, and that we are dealing here with a single graded effect of nutrition on intellectual development, though its determinants are of course quite different before and after birth.

“Handbook of Behavior, Food and Nutrition” by Victor R. Preedy, Ronald Ross Watson, Colin R. Martin
from Handbook of Behavior, Food and Nutrition
by Victor R. Preedy, Ronald Ross Watson, Colin R. Martin
Springer New York, 2011

Oktay Kutluk

Kutluk Oktay, MD, FACOG is one of the world's foremost experts in fertility preservation as well as ovarian stimulation and in vitro fertilization for infertility treatments. He developed and performed the world's first ovarian transplantation procedures as well as pioneered new ovarian stimulation protocols for embryo and oocyte freezing for breast and endometrial cancer patients.

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  • I have gestational diabetes and I’m 35 weeks and 1day today.My baby’s weight is 4lb11oz.Doctor said she is little small.How can I increase her weight?

  • I am 31 weeks and got an ultrasound today and was told that my baby’s arms and legs are below normal measurements and I need to be sent to a specialist..does anyone know the reason or if it’s normal or not?

  • Hello. I just wanna ask. What will happen to the baby inside mom’s womb without taking vitamins starting 1st to 7th months.. Thank you.

  • please answer me right now im very scared my first baby died last november 2019 and then now im pregnant im spotting brown right now last july 09 2020 im 6weeks and 5days and then ultrasound today 6weeks and 1day what wrong? ����

  • I am 34weeks and baby measured 31 weeks.. but weight is 1.9kg normal.Doctor told me to take healthy diet. I am worring abt it… will it affect my baby in any other way after born?

  • I’m 28 weeks baby is measuring almost 2 weeks smaller… my vitamin D was just found to be low… so hopefully taking supplements will help along with eating more fruits and vegetables. Thanks for the video. ❤️

  • Don’t listen to the quack dr. It reduces IQ in adults also and there are multiple studies. If you want to rebuild the enamel on your teeth, take silica as a supplement. I haven’t drank the tap water in over 10 years, I’m certified to produce drinking water in Ontario and work with water for a living

  • Children’s brains start developing in the womb, and continue to actively develop until the early 20’s. As a doctor I think it might be prudent to avoid ingesting fluoride during this time, until meaningful research has been completed showing fluoride ingestion to be safe. Humans lived on this planet for eons without fluoridated water. Better safe than sorry until we know for sure…

  • I hope they factored in the parents time spent engaging with their children rather then handing them an iPad while the parents go and do other things.

  • I had my 28 weeks scan yesterday. I was told my baby is small, her weight is not even a kg yet. I’m so worried I couldn’t sleep. I really don’t know what to do.
    This is my second baby, my son was 4 and half kg when he was born.

  • Hi mam I’m 28wek pregnant but baby shower 25week fumare length all bones growth fall at 10%nd fumare 5%.thiz my second pregnancy fst boy.he is not fine now wht can do to this prblm plzz reply..after birth baby will fine are not I want plzz plzz reply mam

  • I had fluoride in the water kid had a 132 IQ as tested in Gr 2. It’s hereditary, not dependent on environment altogether, but check the sugar levels of the mothers, and how much garbage they were eating.