Name	Info	Provider	Link
Pregnancy	free resource	MedlinePlus Health Information	https://medlineplus.gov/pregnancy.html
	subscription/membership/fee required	Wiley	https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1046-7408&date=1997&volume=37&issue=6&spage=427
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:9228297