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One study found that the amount of caffeine ingested while pregnant wouldn’t have an effect on the baby’s sleep during the first three months of their life. Researchers at the University of Pelotas looked at the children of nearly 900 women who consumed caffeine in pregnancy.
Caffeine intake is not recommended during pregnancy. Caffeine can increase your blood pressure and heart rate and can lead to dehydration.
The researchers found corresponding reductions in size and lean body mass for infants whose mothers consumed below the 200 milligrams of caffeine per day — about two cups of coffee — believed to increase risks to the fetus.
During pregnancy, limit caffeine to less than 200 mg per day and avoid energy drinks entirely. Some herbal teas may be safe to drink, but it’s always best to check with your doctor...
A significant risk of subfecundity was seen in the first pregnancy for women consuming 500 mg/d or greater of caffeine (odds ratio 1.45, 95% CI 1.03 to 2.04). The authors concluded that high levels of caffeine might delay conception. 7. A literature review of human studies from 2000 to 2009 assessed the effect of caffeine on fertility outcomes ...
Some reports suggest that children exposed to more than 500 mg of caffeine per day in the third trimester of pregnancy were more likely to have faster heart rates, shaking, increased breathing rate, and spend more time awake in the days following birth.
Of 11 studies reporting 17 meta-analyses, there was unanimity among 14 analyses in finding maternal caffeine consumption to be associated with increased risk for the four outcome categories of miscarriage, stillbirth, low birth weight and/or small for gestational age, and childhood acute leukaemia.
Most studies find no clear evidence that low (less than 200 mg) to moderate (200-300 mg) of caffeine use during pregnancy increases the chance of low birth weight (weighing less than 5 pounds, 8 ounces [2500 grams] or preterm delivery (birth before week 37 week).
Current guidelines from the American College of Obstetricians and Gynecologists (ACOG) and other experts say that it's safe for pregnant women to consume up to 200 milligrams (mg) of caffeine a day (the equivalent of one 12-ounce cup of coffee).
ABSTRACT: Moderate caffeine consumption (less than 200 mg per day) does not appear to be a major contributing factor in miscarriage or preterm birth. The relationship of caffeine to growth restriction remains undetermined.