Dr. “Our findings show that it makes sense to cut back on caffeine-containing beverages or stop consuming them altogether during pregnancy until you learn more,” said Katherine L. Grantz.
Because scientists have stated that the birth of a baby in smaller sizes increases the risk of obesity, heart disease and diabetes later in life.
Previous studies on this topic have linked excess caffeine consumption (more than 200 milligrams per day) during pregnancy to babies being smaller than they should be. However, studies on caffeine consumption below 200 milligrams have not been conclusive.
The team that led the new study, published in the open-access medical journal JAMA Network Open, noted that most previous studies did not take into account changes in the caffeine content of different beverages and other factors that could affect the baby’s size at birth, such as the mother’s smoking.
55 THOUSAND PREGNANCES EXAMINED
In the study in question, scientists examined two thousand 55 women, between 8 and 13 weeks pregnant. None of the participants were smoking and had no health problems before pregnancy.
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Women gave blood samples between 10 and 13 weeks of pregnancy. Thus, the compound paraxanthin, which is produced when caffeine and caffeine are broken down in the blood, were analyzed. Women also reported caffeine-containing beverages (such as coffee, tea, and energy drinks) they consumed.
The results showed that babies of women with the highest levels of caffeine in their blood were born on average 84 grams lighter, 0.44 centimeters shorter, and head circumference 0.28 centimeters smaller than the babies of women with little or no caffeine.
Babies of women who reported consuming about 50 milligrams of caffeine (about half a cup of medium-strength brewed coffee) a day were found to be 66 grams lighter than babies of people who did not consume caffeine.
Thinking that caffeine causes the vessels in the uterus and placenta to narrow, the researchers stated that this may reduce blood flow to the fetus and inhibit growth.
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