Taking out a tooth isn't the only way out to deal with tooth pain. Though it is safe to extract a tooth during the first month of thirst trimester (7th month) but i would suggest you to take the suggestion of both dentist and Obstetrician.
It is better to get your tooth checked as the tooth pain can have a negative impact on the baby. Only thing you need to take care of is avoid getting an X ray done....For more info on tooth extraction during pregnancyhttp://www.identalhub.com/dental-tooth-extraction-during-pregnancy-884.aspx
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