Women receiving the rinse will be visited by study workers periodically to provide more oral rinse and check on their adherence to the rinse. All 175 women will be visited after 12 weeks to undergo a second oral health clinical examination and provide a second set of gingival crevicular fluid and plaque samples, to allow for evaluation of the effect of each of the oral rinses as compared to the normal physiological changes in gingival inflammation and biofilm composition during the course of pregnancy.