Name	Info	Provider	Link
Health Problems in Pregnancy	free resource	MedlinePlus Health Information	https://medlineplus.gov/healthproblemsinpregnancy.html
Full-text pdf	free resource	Dennis Barber Ltd.	https://www.cdhjournal.org/issues/29-1-march-2012/406-relationship-of-periodontal-disease-to-pre-term-low-birth-weight-infants-in-a-selected-population-a-prospective-study