Caffeine is a substance that naturally occurs in some plants and is considered a stimulant when ingested into the body. According to Emory University School of Medicine, the FDA decided in 1980 that caffeine was not a substance safe for pregnant women. The FDA advised them to limit their intake or omit it all together. Caffeine is capable of crossing the placenta, and it can cross into breast milk as well.
Miscarriage
The American Journal of Obstetrics and Gynecology published a study in March 2008 indicating that pregnant women who ingest 200 mg or more of caffeine per day have twice the risk of miscarriage than women who drank no caffeine. A 12-ounce cup of coffee contains approximately 200 mg of caffeine.
Physical Symptoms at Birth
At birth, babies who have been exposed to large doses of caffeine may exhibit a wide range of physical symptoms. High respiratory rates, irritability, tremors and rarely heart defects have been noted, as described by Emory University School of Medicine. More than 300 mg of caffeine per day is considered a high dose. Caffeine isn't metabolized as quickly in babies as it is in adults, therefore it stays in the baby's body for a longer period of time and has more opportunity to cause damage.
Weight
Babies born to mothers who consumed a lot of caffeine may have a lower birth weight than babies not exposed to caffeine. Mothers who stop drinking caffeine, even in the third trimester, can decrease the risk that the baby will be born with a low birth weight, because the baby gains most of her weight in the third trimester.
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