Caffeine consumption during pregnancy is linked to low birth weight babies as well as an overall increase in the length of gestation, reveals new research published in the journal BMC Medicine. Caffeine is able to freely pass the placental barrier in the same way that nutrients or oxygen can. However, an embryo is not able to inactivate the drug properly, which can cause health concerns. Babies who are born small for their gestational age are more likely to develop serious short- and long-term health problems. Therefore, given the findings of this study, it looks as though the recommended limit of 300mg of caffeine needs to be revised.
Source: Medical News Today