(CNN) - A new study found a slight increase in birth defects among babies born to women who took two popular antidepressants.
The study, led by the Centers for Disease Control and Prevention, looked at results of previous studies, along with new data on about 28,000 births.
It found the slight increase in birth defects in babies born from women taking Paxil and Prozac in the months before getting pregnant and during the first trimester.
However, it did not find any increase for other antidepressants in the same class, such as Zoloft, Celexa and Lexapro.
The drugs all belong to the group known as "Selective serotonin reuptake inhibitors."
The CDC points out the study does not prove Paxil and Prozac actually cause birth defects.
It also says women should not stop taking the drugs they are on without talking to their doctors -and that the analysis can help guide doctors and patients.
The results were published in the medical journal BMJ, which used to be called the British Medical Journal.
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