According to a recent study published in the Canadian Medical Association Journal, women who take antibiotics in the early weeks of their pregnancy are at a higher risk of suffering a miscarriage.

The researchers found that many classes of common antibiotics such as macrolides, quinolones, tetracyclines, sulfonamides and metronidazole were associated with increased risk of miscarriage in early stages of pregnancy.

However, antibiotics such as Erythromycin and nitrofurantoin that are commonly prescribed to treat urinary tract infection were not associated with the risk.

The researchers believe the findings will help policy makers to update guidelines for the treatment of infections during pregnancy.