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=11896835.ui
subscription/membership/fee required Wiley https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0904-2512&date=2002&volume=31&issue=2&spage=121