Metron (metronidazole) is generally considered safe to take during the fifth month of pregnancy (the second trimester) if prescribed by your healthcare provider. While it is typically avoided in the first trimester unless absolutely necessary, current medical evidence shows no significant risk of birth defects or complications when used later in pregnancy. However, you should never self-medicate. Please consult your obstetrician before taking this medication to ensure it is the correct treatment for your specific infection and to receive the appropriate, safe dosage for you and your baby.