You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which one of the following is the best drug of choice for treatment of bacterial vaginosis during pregnancy? and explain in detail?
Treatment of bacterial vaginosis: Sensitive to metronidazole/clindamycin Metronidazole use in the first trimester - no human evidence of teratogenesis Topical therapy using vaginal gel is effective but may not reduce the risk of pre-term delivery. ref Katzung 12th ed