Cranberry juice typically doesn't cause adverse effects for pregnant women, according to the University of Maryland Medical Center. In fact, cranberry juice may help prevent the urinary tract infections, or UTIs, that often come with pregnancy, and the American Pregnancy Association recommends drinking it for that purpose. That said, you should consult your doctor before taking concentrated cranberry supplements, as well as before trying to treat a UTI or any other medical condition at home.
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Cranberry Juice and Pregnancy
The American Pregnancy Association recommends drinking cranberry juice "regularly" to help prevent UTIs, which often occur during weeks 6 through 24 of pregnancy. However, sweetened cranberry juice is high in sugar, so drink unsweetened varieties if you can tolerate the tart taste. During pregnancy, eating a balanced diet is key, so if you drink cranberry juice, consume it along with a variety of other wholesome foods. Don't drink too many calories worth of juice -- most pregnant women only need about 300 extra calories per day during the final two trimesters, the APA reports.