Name	Info	Provider	Link
Health Problems in Pregnancy	free resource	MedlinePlus Health Information	https://medlineplus.gov/healthproblemsinpregnancy.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=20422497.ui
	subscription/membership/fee required	Georg Thieme Verlag Stuttgart, New York	https://www.thieme-connect.com/DOI/DOI?10.1055/s-0030-1253224
Full text from	free resource	Zurich Open Access Repository and Archive	https://doi.org/10.5167/uzh-33976